African clawed frog (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "African clawed frog" in English language version.

refsWebsite

Global rank English rank

30nih.gov

4^th place

25doi.org

2^nd place

8worldcat.org

5^th place

5web.archive.org

1^st place

4semanticscholar.org

11^th place

8^th place

3researchgate.net

120^th place

125^th place

2npr.org

92^nd place

72^nd place

2harvard.edu

18^th place

17^th place

2uwc.ac.za

low place

2oup.com

485^th place

440^th place

2nobelprize.org

301^st place

478^th place

2news.google.com

59^th place

45^th place

2gnb.ca

8,074^th place

5,141^st place

1iucnredlist.org

88^th place

160^th place

1handle.net

102^nd place

76^th place

1si.edu

340^th place

295^th place

1laboratoryxenopus.com

low place

1umich.edu

459^th place

360^th place

1usgs.gov

167^th place

198^th place

1inaturalist.org

8,836^th place

9,111^th place

1thefreelibrary.com

518^th place

331^st place

1ebscohost.com

1,786^th place

1,096^th place

1youtube.com

9^th place

13^th place

1ghostarchive.org

32^nd place

21^st place

1cabdirect.org

low place

1smithsonianmag.com

503^rd place

364^th place

1qi.com

low place

1xenbase.org

low place

1columbia.edu

488^th place

374^th place

1foxnews.com

152^nd place

120^th place

1sfgate.com

166^th place

121^st place

1starbulletin.com

3,085^th place

1,875^th place

cabdirect.org (Global: low place; English: low place)

Shapiro, Hillel A.; Zwarenstein, Harry (March 1935). "A test for the early diagnosis of pregnancy". South African Medical Journal. 9: 202–4.

columbia.edu (Global: 488^th place; English: 374^th place)

Danoff-Burg, James A. "ADW: Columbia: Introduced Species Summary Project". Columbia.edu. Retrieved 8 June 2013.

doi.org (Global: 2^nd place; English: 2^nd place)

Tinsley, R.; Minter, L.; Measey, J.; Howell, K.; Veloso, A.; Núñez, H.; Romano, A. (2009). "Xenopus laevis". IUCN Red List of Threatened Species. 2009 e.T58174A11730010. doi:10.2305/IUCN.UK.2009.RLTS.T58174A11730010.en. Retrieved 28 April 2025.
Weldon C, du Preez LH, Hyatt AD, Muller R, Spears R (December 2004). "Origin of the amphibian chytrid fungus". Emerg Infect Dis. 10 (12): 2100–5. doi:10.3201/eid1012.030804. PMC 3323396. PMID 15663845.
Scheele BC, Pasmans F, Skerratt LF, Berger L, Martel A, Beukema W, Acevedo AA, Burrowes PA, Carvalho T, Catenazzi A, De la Riva I, Fisher MC, Flechas SV, Foster CN, Frías-Álvarez P, Garner TW, Gratwicke B, Guayasamin JM, Hirschfeld M, Kolby JE, Kosch TA, La Marca E, Lindenmayer DB, Lips KR, Longo AV, Maneyro R, McDonald CA, Mendelson J, Palacios-Rodriguez P, Parra-Olea G, Richards-Zawacki CL, Rödel MO, Rovito SM, Soto-Azat C, Toledo LF, Voyles J, Weldon C, Whitfield SM, Wilkinson M, Zamudio KR, Canessa S (March 2019). "Amphibian fungal panzootic causes catastrophic and ongoing loss of biodiversity". Science. 363 (6434): 1459–63. doi:10.1126/science.aav0379. hdl:1885/160196. PMID 30923224. with populations becoming established, mostly likely, from people releasing pets into the wild
Maddin HC, Eckhart L, Jaeger K, Russell AP, Ghannadan M (April 2009). "The anatomy and development of the claws of Xenopus laevis (Lissamphibia: Anura) reveal alternate pathways of structural evolution in the integument of tetrapods". Journal of Anatomy. 214 (4): 607–19. doi:10.1111/j.1469-7580.2009.01052.x. PMC 2736125. PMID 19422431.
Denton, E.J.; Pirenne, M.H. (11 February 1954). "The visual sensitivity of the toad Xenopus laevis". J Physiol. 125 (1): 181–207. doi:10.1113/jphysiol.1954.sp005149. PMC 1365702. PMID 13192764.
McCoid, M.J.; Fritts, T.H. (12 December 1991). "Speculations on colonizing success of the African clawed frog, Xenopus laevis (Pipidae), in California". South African Journal of Zoology. 28: 59–61. doi:10.1080/02541858.1993.11448290 – via ResearchGate.
Nakane, Yusuke; Yoshimura, Takashi (15 February 2019). "Photoperiodic Regulation of Reproduction in Vertebrates". Annual Review of Animal Biosciences. 7 (1). Annual Reviews: 173–194. doi:10.1146/annurev-animal-020518-115216. ISSN 2165-8102. PMID 30332291. S2CID 52984435.
Sämfors, Sanna; Fletcher, John S. (12 June 2020). "Lipid Diversity in Cells and Tissue Using Imaging SIMS". Annual Review of Analytical Chemistry. 13 (1). Annual Reviews: 249–271. Bibcode:2020ARAC...13..249S. doi:10.1146/annurev-anchem-091619-103512. ISSN 1936-1327. PMID 32212820. S2CID 214680586.
Zoller JA, Parasyraki E, Lu AT, Haghani A, Niehrs C, Horvath S (February 2024). "DNA methylation clocks for clawed frogs reveal evolutionary conservation of epigenetic aging". Geroscience. 46 (1): 945–960. doi:10.1007/s11357-023-00840-3. PMC 10828168. PMID 37270437.
Theunissen, M.; Tiedt, L.; Du Preez, L. H. (2014). "The morphology and attachment of Protopolystoma xenopodis (Monogenea: Polystomatidae) infecting the African clawed frog Xenopus laevis". Parasite. 21: 20. doi:10.1051/parasite/2014020. PMC 4018937. PMID 24823278.
Lobos, Gabriel (1 February 2005). "The ongoing invasion of African clawed frogs (xenopus laevis) in chile: Causes of concern". The ongoing invasion of African clawed frogs (xenopus laevis) in chile: Causes of concern. 14 (2): 429–439. doi:10.1007/s10531-004-6403-0. Retrieved 8 March 2024.
Wallingford, John B; Liu, Karen J; Zheng, Yixian (2010). "Xenopus". Current Biology. 20 (6): R263–4. doi:10.1016/j.cub.2010.01.012. PMID 20334828.
Harland, Richard M; Grainger, Robert M (2011). "Xenopus research: Metamorphosed by genetics and genomics". Trends in Genetics. 27 (12): 507–15. doi:10.1016/j.tig.2011.08.003. PMC 3601910. PMID 21963197.
Mainini, Carlos Galli (1947). "Pregnancy test using the male toad". Journal of Clinical Endocrinology & Metabolism. 7 (9): 653–8. doi:10.1210/jcem-7-9-653. PMID 20264656.
Sulman, Felix Gad; Sulman, Edith (1950). "Pregnancy test with the male frog (Rana ridibunda)". Journal of Clinical Endocrinology & Metabolism. 10 (8): 933–8. doi:10.1210/jcem-10-8-933. PMID 15436652.
Naiche, L.A.; Harrelson, Zachary; Kelly, Robert G.; Papaioannou, Virginia E. (1 December 2005). "T-Box Genes in Vertebrate Development". Annual Review of Genetics. 39 (1). Annual Reviews: 219–239. doi:10.1146/annurev.genet.39.073003.105925. ISSN 0066-4197. PMID 16285859.
Nutt, Stephen L; Bronchain, Odile J; Hartley, Katharine O; Amaya, Enrique (2001). "Comparison of morpholino based translational inhibition during the development of Xenopus laevis and Xenopus tropicalis". Genesis. 30 (3): 110–3. doi:10.1002/gene.1042. PMID 11477685. S2CID 22708179.
Blow JJ, Laskey RA (November 1986). "Initiation of DNA replication in nuclei and purified DNA by a cell-free extract of Xenopus eggs". Cell. 47 (4): 577–87. doi:10.1016/0092-8674(86)90622-7. PMID 3779837. S2CID 19018084.
Jewhurst K, Levin M, McLaughlin KA (2014). "Optogenetic control of apoptosis in targeted tissues of Xenopus laevis embryos". Journal of Cell Death. 7: 25–31. doi:10.4137/JCD.S18368. PMC 4213186. PMID 25374461.
Venturi, Sebastiano (2011). "Evolutionary significance of iodine". Current Chemical Biology. 5 (3): 155–162. doi:10.2174/187231311796765012. ISSN 1872-3136.
Tamura K, Takayama S, Ishii T, Mawaribuchi S, Takamatsu N, Ito M (2015). "Apoptosis and differentiation of Xenopus tail-derived myoblasts by thyroid hormone". Journal of Molecular Endocrinology. 54 (3): 185–92. doi:10.1530/JME-14-0327. PMID 25791374.
Session, Adam; et al. (19 October 2016). "Genome evolution in the allotetraploid frog Xenopus laevis". Nature. 538 (7625): 336–343. Bibcode:2016Natur.538..336S. doi:10.1038/nature19840. PMC 5313049. PMID 27762356.
Wicht, Kathryn J.; Mok, Sachel; Fidock, David A. (8 September 2020). "Molecular Mechanisms of Drug Resistance in Plasmodium falciparum Malaria". Annual Review of Microbiology. 74 (1). Annual Reviews: 431–454. doi:10.1146/annurev-micro-020518-115546. ISSN 0066-4227. PMC 8130186. PMID 32905757.
Karimi K, Fortriede JD, Lotay VS, Burns KA, Wang DZ, Fisher ME, Pells TJ, James-Zorn C, Wang Y, Ponferrada VG, Chu S, Chaturvedi P, Zorn AM, Vize PD (2018). "Xenbase: a genomic, epigenomic and transcriptomic model organism database". Nucleic Acids Research. 46 (D1): D861–8. doi:10.1093/nar/gkx936. PMC 5753396. PMID 29059324.
Supen, Wang; Yufeng, Hong; Measey, John (3 May 2019). "An established population of African clawed frogs, Xenopus laevis (Daudin, 1802), in mainland China". BioInvasions Records. 8. doi:10.3391/bir.2019.8.2.29 – via ResearchGate.

ebscohost.com (Global: 1,786^th place; English: 1,096^th place)

web.a.ebscohost.com

Lobos, Gabriel (1 February 2005). "The ongoing invasion of African clawed frogs (xenopus laevis) in chile: Causes of concern". The ongoing invasion of African clawed frogs (xenopus laevis) in chile: Causes of concern. 14 (2): 429–439. doi:10.1007/s10531-004-6403-0. Retrieved 8 March 2024.

foxnews.com (Global: 152^nd place; English: 120^th place)

"Killer Meat-Eating Frogs Terrorize San Francisco". FoxNews. 14 March 2007. Archived from the original on 19 October 2012. Retrieved 13 March 2007.

ghostarchive.org (Global: 32^nd place; English: 21^st place)

"First Frog Genome Sequenced - YouTube". www.youtube.com. Archived from the original on 11 December 2021.

gnb.ca (Global: 8,074^th place; English: 5,141^st place)

"ADW: New Brunswick Regulation 92-74". Archived from the original on 19 August 2011.
"ADW: New Brunswick Acts and regulations". Gnb.ca. Retrieved 8 June 2013.

handle.net (Global: 102^nd place; English: 76^th place)

hdl.handle.net

Scheele BC, Pasmans F, Skerratt LF, Berger L, Martel A, Beukema W, Acevedo AA, Burrowes PA, Carvalho T, Catenazzi A, De la Riva I, Fisher MC, Flechas SV, Foster CN, Frías-Álvarez P, Garner TW, Gratwicke B, Guayasamin JM, Hirschfeld M, Kolby JE, Kosch TA, La Marca E, Lindenmayer DB, Lips KR, Longo AV, Maneyro R, McDonald CA, Mendelson J, Palacios-Rodriguez P, Parra-Olea G, Richards-Zawacki CL, Rödel MO, Rovito SM, Soto-Azat C, Toledo LF, Voyles J, Weldon C, Whitfield SM, Wilkinson M, Zamudio KR, Canessa S (March 2019). "Amphibian fungal panzootic causes catastrophic and ongoing loss of biodiversity". Science. 363 (6434): 1459–63. doi:10.1126/science.aav0379. hdl:1885/160196. PMID 30923224. with populations becoming established, mostly likely, from people releasing pets into the wild

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

Sämfors, Sanna; Fletcher, John S. (12 June 2020). "Lipid Diversity in Cells and Tissue Using Imaging SIMS". Annual Review of Analytical Chemistry. 13 (1). Annual Reviews: 249–271. Bibcode:2020ARAC...13..249S. doi:10.1146/annurev-anchem-091619-103512. ISSN 1936-1327. PMID 32212820. S2CID 214680586.
Session, Adam; et al. (19 October 2016). "Genome evolution in the allotetraploid frog Xenopus laevis". Nature. 538 (7625): 336–343. Bibcode:2016Natur.538..336S. doi:10.1038/nature19840. PMC 5313049. PMID 27762356.

inaturalist.org (Global: 8,836^th place; English: 9,111^th place)

"African Clawed Frog (Xenopus laevis)". iNaturalist. 16 September 2019.

iucnredlist.org (Global: 88^th place; English: 160^th place)

Tinsley, R.; Minter, L.; Measey, J.; Howell, K.; Veloso, A.; Núñez, H.; Romano, A. (2009). "Xenopus laevis". IUCN Red List of Threatened Species. 2009 e.T58174A11730010. doi:10.2305/IUCN.UK.2009.RLTS.T58174A11730010.en. Retrieved 28 April 2025.

laboratoryxenopus.com (Global: low place; English: low place)

"Sherril Green, DMV, PhD, Author The Laboratory Xenopus sp". www.laboratoryxenopus.com.

news.google.com (Global: 59^th place; English: 45^th place)

"Astronauts Fertilize Frog Eggs: Study tadpole development in space project". Ludington Daily News. Associated Press. 14 September 1992. p. 7. Retrieved 19 January 2024 – via Google News.
"Frogs, hornets ready for Endeavour tests". Reading Eagle. Associated Press. 11 September 1992. p. A8. Retrieved 19 January 2024 – via Google News.

nih.gov (Global: 4^th place; English: 4^th place)

pubmed.ncbi.nlm.nih.gov

Weldon C, du Preez LH, Hyatt AD, Muller R, Spears R (December 2004). "Origin of the amphibian chytrid fungus". Emerg Infect Dis. 10 (12): 2100–5. doi:10.3201/eid1012.030804. PMC 3323396. PMID 15663845.
Scheele BC, Pasmans F, Skerratt LF, Berger L, Martel A, Beukema W, Acevedo AA, Burrowes PA, Carvalho T, Catenazzi A, De la Riva I, Fisher MC, Flechas SV, Foster CN, Frías-Álvarez P, Garner TW, Gratwicke B, Guayasamin JM, Hirschfeld M, Kolby JE, Kosch TA, La Marca E, Lindenmayer DB, Lips KR, Longo AV, Maneyro R, McDonald CA, Mendelson J, Palacios-Rodriguez P, Parra-Olea G, Richards-Zawacki CL, Rödel MO, Rovito SM, Soto-Azat C, Toledo LF, Voyles J, Weldon C, Whitfield SM, Wilkinson M, Zamudio KR, Canessa S (March 2019). "Amphibian fungal panzootic causes catastrophic and ongoing loss of biodiversity". Science. 363 (6434): 1459–63. doi:10.1126/science.aav0379. hdl:1885/160196. PMID 30923224. with populations becoming established, mostly likely, from people releasing pets into the wild
Maddin HC, Eckhart L, Jaeger K, Russell AP, Ghannadan M (April 2009). "The anatomy and development of the claws of Xenopus laevis (Lissamphibia: Anura) reveal alternate pathways of structural evolution in the integument of tetrapods". Journal of Anatomy. 214 (4): 607–19. doi:10.1111/j.1469-7580.2009.01052.x. PMC 2736125. PMID 19422431.
Denton, E.J.; Pirenne, M.H. (11 February 1954). "The visual sensitivity of the toad Xenopus laevis". J Physiol. 125 (1): 181–207. doi:10.1113/jphysiol.1954.sp005149. PMC 1365702. PMID 13192764.
Nakane, Yusuke; Yoshimura, Takashi (15 February 2019). "Photoperiodic Regulation of Reproduction in Vertebrates". Annual Review of Animal Biosciences. 7 (1). Annual Reviews: 173–194. doi:10.1146/annurev-animal-020518-115216. ISSN 2165-8102. PMID 30332291. S2CID 52984435.
Sämfors, Sanna; Fletcher, John S. (12 June 2020). "Lipid Diversity in Cells and Tissue Using Imaging SIMS". Annual Review of Analytical Chemistry. 13 (1). Annual Reviews: 249–271. Bibcode:2020ARAC...13..249S. doi:10.1146/annurev-anchem-091619-103512. ISSN 1936-1327. PMID 32212820. S2CID 214680586.
Zoller JA, Parasyraki E, Lu AT, Haghani A, Niehrs C, Horvath S (February 2024). "DNA methylation clocks for clawed frogs reveal evolutionary conservation of epigenetic aging". Geroscience. 46 (1): 945–960. doi:10.1007/s11357-023-00840-3. PMC 10828168. PMID 37270437.
Theunissen, M.; Tiedt, L.; Du Preez, L. H. (2014). "The morphology and attachment of Protopolystoma xenopodis (Monogenea: Polystomatidae) infecting the African clawed frog Xenopus laevis". Parasite. 21: 20. doi:10.1051/parasite/2014020. PMC 4018937. PMID 24823278.
Wallingford, John B; Liu, Karen J; Zheng, Yixian (2010). "Xenopus". Current Biology. 20 (6): R263–4. doi:10.1016/j.cub.2010.01.012. PMID 20334828.
Harland, Richard M; Grainger, Robert M (2011). "Xenopus research: Metamorphosed by genetics and genomics". Trends in Genetics. 27 (12): 507–15. doi:10.1016/j.tig.2011.08.003. PMC 3601910. PMID 21963197.
Mainini, Carlos Galli (1947). "Pregnancy test using the male toad". Journal of Clinical Endocrinology & Metabolism. 7 (9): 653–8. doi:10.1210/jcem-7-9-653. PMID 20264656.
Sulman, Felix Gad; Sulman, Edith (1950). "Pregnancy test with the male frog (Rana ridibunda)". Journal of Clinical Endocrinology & Metabolism. 10 (8): 933–8. doi:10.1210/jcem-10-8-933. PMID 15436652.
Naiche, L.A.; Harrelson, Zachary; Kelly, Robert G.; Papaioannou, Virginia E. (1 December 2005). "T-Box Genes in Vertebrate Development". Annual Review of Genetics. 39 (1). Annual Reviews: 219–239. doi:10.1146/annurev.genet.39.073003.105925. ISSN 0066-4197. PMID 16285859.
Nutt, Stephen L; Bronchain, Odile J; Hartley, Katharine O; Amaya, Enrique (2001). "Comparison of morpholino based translational inhibition during the development of Xenopus laevis and Xenopus tropicalis". Genesis. 30 (3): 110–3. doi:10.1002/gene.1042. PMID 11477685. S2CID 22708179.
Blow JJ, Laskey RA (November 1986). "Initiation of DNA replication in nuclei and purified DNA by a cell-free extract of Xenopus eggs". Cell. 47 (4): 577–87. doi:10.1016/0092-8674(86)90622-7. PMID 3779837. S2CID 19018084.
Jewhurst K, Levin M, McLaughlin KA (2014). "Optogenetic control of apoptosis in targeted tissues of Xenopus laevis embryos". Journal of Cell Death. 7: 25–31. doi:10.4137/JCD.S18368. PMC 4213186. PMID 25374461.
Tamura K, Takayama S, Ishii T, Mawaribuchi S, Takamatsu N, Ito M (2015). "Apoptosis and differentiation of Xenopus tail-derived myoblasts by thyroid hormone". Journal of Molecular Endocrinology. 54 (3): 185–92. doi:10.1530/JME-14-0327. PMID 25791374.
Session, Adam; et al. (19 October 2016). "Genome evolution in the allotetraploid frog Xenopus laevis". Nature. 538 (7625): 336–343. Bibcode:2016Natur.538..336S. doi:10.1038/nature19840. PMC 5313049. PMID 27762356.
Wicht, Kathryn J.; Mok, Sachel; Fidock, David A. (8 September 2020). "Molecular Mechanisms of Drug Resistance in Plasmodium falciparum Malaria". Annual Review of Microbiology. 74 (1). Annual Reviews: 431–454. doi:10.1146/annurev-micro-020518-115546. ISSN 0066-4227. PMC 8130186. PMID 32905757.
Karimi K, Fortriede JD, Lotay VS, Burns KA, Wang DZ, Fisher ME, Pells TJ, James-Zorn C, Wang Y, Ponferrada VG, Chu S, Chaturvedi P, Zorn AM, Vize PD (2018). "Xenbase: a genomic, epigenomic and transcriptomic model organism database". Nucleic Acids Research. 46 (D1): D861–8. doi:10.1093/nar/gkx936. PMC 5753396. PMID 29059324.

ncbi.nlm.nih.gov

Weldon C, du Preez LH, Hyatt AD, Muller R, Spears R (December 2004). "Origin of the amphibian chytrid fungus". Emerg Infect Dis. 10 (12): 2100–5. doi:10.3201/eid1012.030804. PMC 3323396. PMID 15663845.
Maddin HC, Eckhart L, Jaeger K, Russell AP, Ghannadan M (April 2009). "The anatomy and development of the claws of Xenopus laevis (Lissamphibia: Anura) reveal alternate pathways of structural evolution in the integument of tetrapods". Journal of Anatomy. 214 (4): 607–19. doi:10.1111/j.1469-7580.2009.01052.x. PMC 2736125. PMID 19422431.
Denton, E.J.; Pirenne, M.H. (11 February 1954). "The visual sensitivity of the toad Xenopus laevis". J Physiol. 125 (1): 181–207. doi:10.1113/jphysiol.1954.sp005149. PMC 1365702. PMID 13192764.
Zoller JA, Parasyraki E, Lu AT, Haghani A, Niehrs C, Horvath S (February 2024). "DNA methylation clocks for clawed frogs reveal evolutionary conservation of epigenetic aging". Geroscience. 46 (1): 945–960. doi:10.1007/s11357-023-00840-3. PMC 10828168. PMID 37270437.
Theunissen, M.; Tiedt, L.; Du Preez, L. H. (2014). "The morphology and attachment of Protopolystoma xenopodis (Monogenea: Polystomatidae) infecting the African clawed frog Xenopus laevis". Parasite. 21: 20. doi:10.1051/parasite/2014020. PMC 4018937. PMID 24823278.
Harland, Richard M; Grainger, Robert M (2011). "Xenopus research: Metamorphosed by genetics and genomics". Trends in Genetics. 27 (12): 507–15. doi:10.1016/j.tig.2011.08.003. PMC 3601910. PMID 21963197.
Jewhurst K, Levin M, McLaughlin KA (2014). "Optogenetic control of apoptosis in targeted tissues of Xenopus laevis embryos". Journal of Cell Death. 7: 25–31. doi:10.4137/JCD.S18368. PMC 4213186. PMID 25374461.
Session, Adam; et al. (19 October 2016). "Genome evolution in the allotetraploid frog Xenopus laevis". Nature. 538 (7625): 336–343. Bibcode:2016Natur.538..336S. doi:10.1038/nature19840. PMC 5313049. PMID 27762356.
Wicht, Kathryn J.; Mok, Sachel; Fidock, David A. (8 September 2020). "Molecular Mechanisms of Drug Resistance in Plasmodium falciparum Malaria". Annual Review of Microbiology. 74 (1). Annual Reviews: 431–454. doi:10.1146/annurev-micro-020518-115546. ISSN 0066-4227. PMC 8130186. PMID 32905757.
Karimi K, Fortriede JD, Lotay VS, Burns KA, Wang DZ, Fisher ME, Pells TJ, James-Zorn C, Wang Y, Ponferrada VG, Chu S, Chaturvedi P, Zorn AM, Vize PD (2018). "Xenbase: a genomic, epigenomic and transcriptomic model organism database". Nucleic Acids Research. 46 (D1): D861–8. doi:10.1093/nar/gkx936. PMC 5753396. PMID 29059324.

nobelprize.org (Global: 301^st place; English: 478^th place)

"The Nobel Prize in Physiology or Medicine 2012". NobelPrize.org.
"The Nobel Prize in Physiology or Medicine 2012". www.nobelprize.org. Retrieved 20 June 2016.

npr.org (Global: 92^nd place; English: 72^nd place)

Talk of the Nation. "ADW: NPR: Listening To Love Songs of African Clawed Frogs". NPR.org. NPR. Retrieved 8 June 2013.
"NPR December 22, 2007". Npr.org. 22 December 2007. Retrieved 8 June 2013.

oup.com (Global: 485^th place; English: 440^th place)

academic.oup.com

Mainini, Carlos Galli (1947). "Pregnancy test using the male toad". Journal of Clinical Endocrinology & Metabolism. 7 (9): 653–8. doi:10.1210/jcem-7-9-653. PMID 20264656.
Sulman, Felix Gad; Sulman, Edith (1950). "Pregnancy test with the male frog (Rana ridibunda)". Journal of Clinical Endocrinology & Metabolism. 10 (8): 933–8. doi:10.1210/jcem-10-8-933. PMID 15436652.

qi.com (Global: low place; English: low place)

old.qi.com

"QI Talk Forum | View topic - Flora and Fauna - Pregnancy tests using frogs". old.qi.com. Retrieved 8 September 2018.

researchgate.net (Global: 120^th place; English: 125^th place)

Measy, John; Tinsley, Richard (1998). "Feral Xenopus Laevis in South Wales". Herpetological Journal. 8: 23–27 – via ResearchGate.
McCoid, M.J.; Fritts, T.H. (12 December 1991). "Speculations on colonizing success of the African clawed frog, Xenopus laevis (Pipidae), in California". South African Journal of Zoology. 28: 59–61. doi:10.1080/02541858.1993.11448290 – via ResearchGate.
Supen, Wang; Yufeng, Hong; Measey, John (3 May 2019). "An established population of African clawed frogs, Xenopus laevis (Daudin, 1802), in mainland China". BioInvasions Records. 8. doi:10.3391/bir.2019.8.2.29 – via ResearchGate.

semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Nakane, Yusuke; Yoshimura, Takashi (15 February 2019). "Photoperiodic Regulation of Reproduction in Vertebrates". Annual Review of Animal Biosciences. 7 (1). Annual Reviews: 173–194. doi:10.1146/annurev-animal-020518-115216. ISSN 2165-8102. PMID 30332291. S2CID 52984435.
Sämfors, Sanna; Fletcher, John S. (12 June 2020). "Lipid Diversity in Cells and Tissue Using Imaging SIMS". Annual Review of Analytical Chemistry. 13 (1). Annual Reviews: 249–271. Bibcode:2020ARAC...13..249S. doi:10.1146/annurev-anchem-091619-103512. ISSN 1936-1327. PMID 32212820. S2CID 214680586.
Nutt, Stephen L; Bronchain, Odile J; Hartley, Katharine O; Amaya, Enrique (2001). "Comparison of morpholino based translational inhibition during the development of Xenopus laevis and Xenopus tropicalis". Genesis. 30 (3): 110–3. doi:10.1002/gene.1042. PMID 11477685. S2CID 22708179.
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