Variable star (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Variable star" in English language version.

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aavso.org

"Variable Star Classification and Light Curves" (PDF). Retrieved 15 April 2020.
Variable Star Of The Season, Winter 2005: The Beta Cephei Stars and Their Relatives Archived 2010-06-15 at the Wayback Machine, John Percy, AAVSO. Accessed October 2, 2008.
"Rotating Variables: Mapping the Surfaces of the Stars | aavso". www.aavso.org. Retrieved 2023-12-12.

archive.org

Payne, Cecilia H. (1930). The Stars Of High Luminosity. Osmania University, Digital Library Of India. McGraw Hill Book Company Inc.

arxiv.org

Jetsu, L.; Porceddu, S.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2013). "Did the Ancient Egyptians Record the Period of the Eclipsing Binary Algol - The Raging One?". The Astrophysical Journal. 773 (1): A1 (14pp). arXiv:1204.6206. Bibcode:2013ApJ...773....1J. doi:10.1088/0004-637X/773/1/1. S2CID 119191453.
Jetsu, L.; Porceddu, S. (2015). "Shifting Milestones of Natural Sciences: The Ancient Egyptian Discovery of Algol's Period Confirmed". PLOS ONE. 10 (12): e.0144140 (23pp). arXiv:1601.06990. Bibcode:2015PLoSO..1044140J. doi:10.1371/journal.pone.0144140. PMC 4683080. PMID 26679699.
Hamacher, D.W. (2018). "Observations of red-giant variable stars by Aboriginal Australians". The Australian Journal of Anthropology. 29 (1): 89–107. arXiv:1709.04634. Bibcode:2018AuJAn..29...89H. doi:10.1111/taja.12257. hdl:11343/293572. S2CID 119453488.
Schaefer, B.E. (2018). "Yes, Aboriginal Australians can and did discover the variability of Betelgeuse". Journal of Astronomical History and Heritage. 21 (1): 7–12. arXiv:1808.01862. doi:10.3724/SP.J.1440-2807.2018.01.02. S2CID 119209432.
Soszyński, I. (2007). "Long Secondary Periods and Binarity in Red Giant Stars". The Astrophysical Journal. 660 (2): 1486–1491. arXiv:astro-ph/0701463. Bibcode:2007ApJ...660.1486S. doi:10.1086/513012. S2CID 2445038.
Nagel, T.; Werner, K. (2004). "Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star HE 1429-1209". Astronomy and Astrophysics. 426 (2): L45. arXiv:astro-ph/0409243. Bibcode:2004A&A...426L..45N. doi:10.1051/0004-6361:200400079. S2CID 9481357.
Dorn-Wallenstein, Trevor Z.; Levesque, Emily M.; Neugent, Kathryn F.; Davenport, James R. A.; Morris, Brett M.; Gootkin, Keyan (2020). "Short Term Variability of Evolved Massive Stars with TESS II: A New Class of Cool, Pulsating Supergiants". The Astrophysical Journal. 902 (1): 24. arXiv:2008.11723. Bibcode:2020ApJ...902...24D. doi:10.3847/1538-4357/abb318. S2CID 221340538.

books.google.com

Burnell, S. Jocelyn Bell (2004-02-26). An Introduction to the Sun and Stars. Cambridge University Press. ISBN 978-0-521-54622-5.

britannica.com

"Cecilia Payne-Gaposchkin | British Astronomer & Harvard Professor | Britannica". www.britannica.com. Retrieved 2024-08-10.

doi.org

Alexeev, Boris V. (2017-01-01), Alexeev, Boris V. (ed.), "Chapter 7 - Nonlocal Theory of Variable Stars", Nonlocal Astrophysics, Elsevier, pp. 321–377, doi:10.1016/b978-0-444-64019-2.00007-7, ISBN 978-0-444-64019-2, retrieved 2023-06-06
Fröhlich, C. (2006). "Solar Irradiance Variability Since 1978". Space Science Reviews. 125 (1–4): 53–65. Bibcode:2006SSRv..125...53F. doi:10.1007/s11214-006-9046-5. S2CID 54697141.
Porceddu, S.; Jetsu, L.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2008). "Evidence of Periodicity in Ancient Egyptian Calendars of Lucky and Unlucky Days". Cambridge Archaeological Journal. 18 (3): 327–339. Bibcode:2008CArcJ..18..327P. doi:10.1017/S0959774308000395. S2CID 162969143.
Jetsu, L.; Porceddu, S.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2013). "Did the Ancient Egyptians Record the Period of the Eclipsing Binary Algol - The Raging One?". The Astrophysical Journal. 773 (1): A1 (14pp). arXiv:1204.6206. Bibcode:2013ApJ...773....1J. doi:10.1088/0004-637X/773/1/1. S2CID 119191453.
Jetsu, L.; Porceddu, S. (2015). "Shifting Milestones of Natural Sciences: The Ancient Egyptian Discovery of Algol's Period Confirmed". PLOS ONE. 10 (12): e.0144140 (23pp). arXiv:1601.06990. Bibcode:2015PLoSO..1044140J. doi:10.1371/journal.pone.0144140. PMC 4683080. PMID 26679699.
Hamacher, D.W. (2018). "Observations of red-giant variable stars by Aboriginal Australians". The Australian Journal of Anthropology. 29 (1): 89–107. arXiv:1709.04634. Bibcode:2018AuJAn..29...89H. doi:10.1111/taja.12257. hdl:11343/293572. S2CID 119453488.
Schaefer, B.E. (2018). "Yes, Aboriginal Australians can and did discover the variability of Betelgeuse". Journal of Astronomical History and Heritage. 21 (1): 7–12. arXiv:1808.01862. doi:10.3724/SP.J.1440-2807.2018.01.02. S2CID 119209432.
Mestel, Leon (2004). "2004JAHH....7...65M Page 65". Journal of Astronomical History and Heritage. 7 (2): 65. Bibcode:2004JAHH....7...65M. doi:10.3724/SP.J.1440-2807.2004.02.01. S2CID 256563765. Retrieved 2020-04-15.
Cox, John P. (1963). "1963ApJ...138..487C Page 487". The Astrophysical Journal. 138: 487. Bibcode:1963ApJ...138..487C. doi:10.1086/147661. Retrieved 2020-04-15.
Messina, Sergio (2007). "Evidence for the pulsational origin of the Long Secondary Periods: The red supergiant star V424 Lac (HD 216946)". New Astronomy. 12 (7): 556–561. Bibcode:2007NewA...12..556M. doi:10.1016/j.newast.2007.04.002.
Soszyński, I. (2007). "Long Secondary Periods and Binarity in Red Giant Stars". The Astrophysical Journal. 660 (2): 1486–1491. arXiv:astro-ph/0701463. Bibcode:2007ApJ...660.1486S. doi:10.1086/513012. S2CID 2445038.
Olivier, E. A.; Wood, P. R. (2003). "On the Origin of Long Secondary Periods in Semiregular Variables". The Astrophysical Journal. 584 (2): 1035. Bibcode:2003ApJ...584.1035O. CiteSeerX 10.1.1.514.3679. doi:10.1086/345715. S2CID 40373007.
Lesh, J. R.; Aizenman, M. L. (1978). "The observational status of the Beta Cephei stars". Annual Review of Astronomy and Astrophysics. 16: 215–240. Bibcode:1978ARA&A..16..215L. doi:10.1146/annurev.aa.16.090178.001243.
Kilkenny, D. (2007). "Pulsating Hot Subdwarfs -- an Observational Review". Communications in Asteroseismology. 150: 234–240. Bibcode:2007CoAst.150..234K. doi:10.1553/cia150s234.
Koester, D.; Chanmugam, G. (1990). "REVIEW: Physics of white dwarf stars". Reports on Progress in Physics. 53 (7): 837. Bibcode:1990RPPh...53..837K. doi:10.1088/0034-4885/53/7/001. S2CID 122582479.
Quirion, P.-O.; Fontaine, G.; Brassard, P. (2007). "Mapping the Instability Domains of GW Vir Stars in the Effective Temperature-Surface Gravity Diagram". The Astrophysical Journal Supplement Series. 171 (1): 219–248. Bibcode:2007ApJS..171..219Q. doi:10.1086/513870.
Nagel, T.; Werner, K. (2004). "Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star HE 1429-1209". Astronomy and Astrophysics. 426 (2): L45. arXiv:astro-ph/0409243. Bibcode:2004A&A...426L..45N. doi:10.1051/0004-6361:200400079. S2CID 9481357.
Dorn-Wallenstein, Trevor Z.; Levesque, Emily M.; Neugent, Kathryn F.; Davenport, James R. A.; Morris, Brett M.; Gootkin, Keyan (2020). "Short Term Variability of Evolved Massive Stars with TESS II: A New Class of Cool, Pulsating Supergiants". The Astrophysical Journal. 902 (1): 24. arXiv:2008.11723. Bibcode:2020ApJ...902...24D. doi:10.3847/1538-4357/abb318. S2CID 221340538.
Panov, K.; Dimitrov, D. (May 2007). "Long-term photometric study of FK Comae Berenices and HD 199178". Astronomy and Astrophysics. 467 (1): 229–235. Bibcode:2007A&A...467..229P. doi:10.1051/0004-6361:20065596. S2CID 120275241.
Livio, Mario; Soker, Noam (June 1988). "The Common Envelope Phase in the Evolution of Binary Stars". Astrophysical Journal. 329: 764. Bibcode:1988ApJ...329..764L. doi:10.1086/166419.

handle.net

hdl.handle.net

Hamacher, D.W. (2018). "Observations of red-giant variable stars by Aboriginal Australians". The Australian Journal of Anthropology. 29 (1): 89–107. arXiv:1709.04634. Bibcode:2018AuJAn..29...89H. doi:10.1111/taja.12257. hdl:11343/293572. S2CID 119453488.

harvard.edu

ui.adsabs.harvard.edu

Fröhlich, C. (2006). "Solar Irradiance Variability Since 1978". Space Science Reviews. 125 (1–4): 53–65. Bibcode:2006SSRv..125...53F. doi:10.1007/s11214-006-9046-5. S2CID 54697141.
Porceddu, S.; Jetsu, L.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2008). "Evidence of Periodicity in Ancient Egyptian Calendars of Lucky and Unlucky Days". Cambridge Archaeological Journal. 18 (3): 327–339. Bibcode:2008CArcJ..18..327P. doi:10.1017/S0959774308000395. S2CID 162969143.
Jetsu, L.; Porceddu, S.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2013). "Did the Ancient Egyptians Record the Period of the Eclipsing Binary Algol - The Raging One?". The Astrophysical Journal. 773 (1): A1 (14pp). arXiv:1204.6206. Bibcode:2013ApJ...773....1J. doi:10.1088/0004-637X/773/1/1. S2CID 119191453.
Jetsu, L.; Porceddu, S. (2015). "Shifting Milestones of Natural Sciences: The Ancient Egyptian Discovery of Algol's Period Confirmed". PLOS ONE. 10 (12): e.0144140 (23pp). arXiv:1601.06990. Bibcode:2015PLoSO..1044140J. doi:10.1371/journal.pone.0144140. PMC 4683080. PMID 26679699.
Hamacher, D.W. (2018). "Observations of red-giant variable stars by Aboriginal Australians". The Australian Journal of Anthropology. 29 (1): 89–107. arXiv:1709.04634. Bibcode:2018AuJAn..29...89H. doi:10.1111/taja.12257. hdl:11343/293572. S2CID 119453488.
Samus, N. N.; Kazarovets, E. V.; Durlevich, O. V. (2001). "General Catalogue of Variable Stars". Odessa Astronomical Publications. 14: 266. Bibcode:2001OAP....14..266S.
Mestel, Leon (2004). "2004JAHH....7...65M Page 65". Journal of Astronomical History and Heritage. 7 (2): 65. Bibcode:2004JAHH....7...65M. doi:10.3724/SP.J.1440-2807.2004.02.01. S2CID 256563765. Retrieved 2020-04-15.
Cox, J. P. (1967). "1967IAUS...28....3C Page 3". Aerodynamic Phenomena in Stellar Atmospheres. 28: 3. Bibcode:1967IAUS...28....3C. Retrieved 2020-04-15.
Cox, John P. (1963). "1963ApJ...138..487C Page 487". The Astrophysical Journal. 138: 487. Bibcode:1963ApJ...138..487C. doi:10.1086/147661. Retrieved 2020-04-15.
Messina, Sergio (2007). "Evidence for the pulsational origin of the Long Secondary Periods: The red supergiant star V424 Lac (HD 216946)". New Astronomy. 12 (7): 556–561. Bibcode:2007NewA...12..556M. doi:10.1016/j.newast.2007.04.002.
Soszyński, I. (2007). "Long Secondary Periods and Binarity in Red Giant Stars". The Astrophysical Journal. 660 (2): 1486–1491. arXiv:astro-ph/0701463. Bibcode:2007ApJ...660.1486S. doi:10.1086/513012. S2CID 2445038.
Olivier, E. A.; Wood, P. R. (2003). "On the Origin of Long Secondary Periods in Semiregular Variables". The Astrophysical Journal. 584 (2): 1035. Bibcode:2003ApJ...584.1035O. CiteSeerX 10.1.1.514.3679. doi:10.1086/345715. S2CID 40373007.
Lesh, J. R.; Aizenman, M. L. (1978). "The observational status of the Beta Cephei stars". Annual Review of Astronomy and Astrophysics. 16: 215–240. Bibcode:1978ARA&A..16..215L. doi:10.1146/annurev.aa.16.090178.001243.
De Cat, P. (2002). "An Observational Overview of Pulsations in β Cep Stars and Slowly Pulsating B Stars (invited paper)". Radial and Nonradial Pulsations as Probes of Stellar Physics. 259: 196. Bibcode:2002ASPC..259..196D.
Kilkenny, D. (2007). "Pulsating Hot Subdwarfs -- an Observational Review". Communications in Asteroseismology. 150: 234–240. Bibcode:2007CoAst.150..234K. doi:10.1553/cia150s234.
Koester, D.; Chanmugam, G. (1990). "REVIEW: Physics of white dwarf stars". Reports on Progress in Physics. 53 (7): 837. Bibcode:1990RPPh...53..837K. doi:10.1088/0034-4885/53/7/001. S2CID 122582479.
Murdin, Paul (2002). Encyclopedia of Astronomy and Astrophysics. Bibcode:2002eaa..book.....M. ISBN 0-333-75088-8.
Quirion, P.-O.; Fontaine, G.; Brassard, P. (2007). "Mapping the Instability Domains of GW Vir Stars in the Effective Temperature-Surface Gravity Diagram". The Astrophysical Journal Supplement Series. 171 (1): 219–248. Bibcode:2007ApJS..171..219Q. doi:10.1086/513870.
Nagel, T.; Werner, K. (2004). "Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star HE 1429-1209". Astronomy and Astrophysics. 426 (2): L45. arXiv:astro-ph/0409243. Bibcode:2004A&A...426L..45N. doi:10.1051/0004-6361:200400079. S2CID 9481357.
Dorn-Wallenstein, Trevor Z.; Levesque, Emily M.; Neugent, Kathryn F.; Davenport, James R. A.; Morris, Brett M.; Gootkin, Keyan (2020). "Short Term Variability of Evolved Massive Stars with TESS II: A New Class of Cool, Pulsating Supergiants". The Astrophysical Journal. 902 (1): 24. arXiv:2008.11723. Bibcode:2020ApJ...902...24D. doi:10.3847/1538-4357/abb318. S2CID 221340538.
Panov, K.; Dimitrov, D. (May 2007). "Long-term photometric study of FK Comae Berenices and HD 199178". Astronomy and Astrophysics. 467 (1): 229–235. Bibcode:2007A&A...467..229P. doi:10.1051/0004-6361:20065596. S2CID 120275241.
Livio, Mario; Soker, Noam (June 1988). "The Common Envelope Phase in the Evolution of Binary Stars". Astrophysical Journal. 329: 764. Bibcode:1988ApJ...329..764L. doi:10.1086/166419.

adsabs.harvard.edu

Mestel, Leon (2004). "2004JAHH....7...65M Page 65". Journal of Astronomical History and Heritage. 7 (2): 65. Bibcode:2004JAHH....7...65M. doi:10.3724/SP.J.1440-2807.2004.02.01. S2CID 256563765. Retrieved 2020-04-15.
Cox, J. P. (1967). "1967IAUS...28....3C Page 3". Aerodynamic Phenomena in Stellar Atmospheres. 28: 3. Bibcode:1967IAUS...28....3C. Retrieved 2020-04-15.
Cox, John P. (1963). "1963ApJ...138..487C Page 487". The Astrophysical Journal. 138: 487. Bibcode:1963ApJ...138..487C. doi:10.1086/147661. Retrieved 2020-04-15.

nih.gov

ncbi.nlm.nih.gov

Jetsu, L.; Porceddu, S. (2015). "Shifting Milestones of Natural Sciences: The Ancient Egyptian Discovery of Algol's Period Confirmed". PLOS ONE. 10 (12): e.0144140 (23pp). arXiv:1601.06990. Bibcode:2015PLoSO..1044140J. doi:10.1371/journal.pone.0144140. PMC 4683080. PMID 26679699.

pubmed.ncbi.nlm.nih.gov

Jetsu, L.; Porceddu, S. (2015). "Shifting Milestones of Natural Sciences: The Ancient Egyptian Discovery of Algol's Period Confirmed". PLOS ONE. 10 (12): e.0144140 (23pp). arXiv:1601.06990. Bibcode:2015PLoSO..1044140J. doi:10.1371/journal.pone.0144140. PMC 4683080. PMID 26679699.

psu.edu

citeseerx.ist.psu.edu

Olivier, E. A.; Wood, P. R. (2003). "On the Origin of Long Secondary Periods in Semiregular Variables". The Astrophysical Journal. 584 (2): 1035. Bibcode:2003ApJ...584.1035O. CiteSeerX 10.1.1.514.3679. doi:10.1086/345715. S2CID 40373007.

sciencedirect.com

Alexeev, Boris V. (2017-01-01), Alexeev, Boris V. (ed.), "Chapter 7 - Nonlocal Theory of Variable Stars", Nonlocal Astrophysics, Elsevier, pp. 321–377, doi:10.1016/b978-0-444-64019-2.00007-7, ISBN 978-0-444-64019-2, retrieved 2023-06-06

sciengine.com

Schaefer, B.E. (2018). "Yes, Aboriginal Australians can and did discover the variability of Betelgeuse". Journal of Astronomical History and Heritage. 21 (1): 7–12. arXiv:1808.01862. doi:10.3724/SP.J.1440-2807.2018.01.02. S2CID 119209432.

semanticscholar.org

api.semanticscholar.org

Fröhlich, C. (2006). "Solar Irradiance Variability Since 1978". Space Science Reviews. 125 (1–4): 53–65. Bibcode:2006SSRv..125...53F. doi:10.1007/s11214-006-9046-5. S2CID 54697141.
Porceddu, S.; Jetsu, L.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2008). "Evidence of Periodicity in Ancient Egyptian Calendars of Lucky and Unlucky Days". Cambridge Archaeological Journal. 18 (3): 327–339. Bibcode:2008CArcJ..18..327P. doi:10.1017/S0959774308000395. S2CID 162969143.
Jetsu, L.; Porceddu, S.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2013). "Did the Ancient Egyptians Record the Period of the Eclipsing Binary Algol - The Raging One?". The Astrophysical Journal. 773 (1): A1 (14pp). arXiv:1204.6206. Bibcode:2013ApJ...773....1J. doi:10.1088/0004-637X/773/1/1. S2CID 119191453.
Hamacher, D.W. (2018). "Observations of red-giant variable stars by Aboriginal Australians". The Australian Journal of Anthropology. 29 (1): 89–107. arXiv:1709.04634. Bibcode:2018AuJAn..29...89H. doi:10.1111/taja.12257. hdl:11343/293572. S2CID 119453488.
Schaefer, B.E. (2018). "Yes, Aboriginal Australians can and did discover the variability of Betelgeuse". Journal of Astronomical History and Heritage. 21 (1): 7–12. arXiv:1808.01862. doi:10.3724/SP.J.1440-2807.2018.01.02. S2CID 119209432.
Mestel, Leon (2004). "2004JAHH....7...65M Page 65". Journal of Astronomical History and Heritage. 7 (2): 65. Bibcode:2004JAHH....7...65M. doi:10.3724/SP.J.1440-2807.2004.02.01. S2CID 256563765. Retrieved 2020-04-15.
Soszyński, I. (2007). "Long Secondary Periods and Binarity in Red Giant Stars". The Astrophysical Journal. 660 (2): 1486–1491. arXiv:astro-ph/0701463. Bibcode:2007ApJ...660.1486S. doi:10.1086/513012. S2CID 2445038.
Olivier, E. A.; Wood, P. R. (2003). "On the Origin of Long Secondary Periods in Semiregular Variables". The Astrophysical Journal. 584 (2): 1035. Bibcode:2003ApJ...584.1035O. CiteSeerX 10.1.1.514.3679. doi:10.1086/345715. S2CID 40373007.
Koester, D.; Chanmugam, G. (1990). "REVIEW: Physics of white dwarf stars". Reports on Progress in Physics. 53 (7): 837. Bibcode:1990RPPh...53..837K. doi:10.1088/0034-4885/53/7/001. S2CID 122582479.
Nagel, T.; Werner, K. (2004). "Detection of non-radial g-mode pulsations in the newly discovered PG 1159 star HE 1429-1209". Astronomy and Astrophysics. 426 (2): L45. arXiv:astro-ph/0409243. Bibcode:2004A&A...426L..45N. doi:10.1051/0004-6361:200400079. S2CID 9481357.
Dorn-Wallenstein, Trevor Z.; Levesque, Emily M.; Neugent, Kathryn F.; Davenport, James R. A.; Morris, Brett M.; Gootkin, Keyan (2020). "Short Term Variability of Evolved Massive Stars with TESS II: A New Class of Cool, Pulsating Supergiants". The Astrophysical Journal. 902 (1): 24. arXiv:2008.11723. Bibcode:2020ApJ...902...24D. doi:10.3847/1538-4357/abb318. S2CID 221340538.
Panov, K.; Dimitrov, D. (May 2007). "Long-term photometric study of FK Comae Berenices and HD 199178". Astronomy and Astrophysics. 467 (1): 229–235. Bibcode:2007A&A...467..229P. doi:10.1051/0004-6361:20065596. S2CID 120275241.

semanticscholar.org

Koester, D.; Chanmugam, G. (1990). "REVIEW: Physics of white dwarf stars". Reports on Progress in Physics. 53 (7): 837. Bibcode:1990RPPh...53..837K. doi:10.1088/0034-4885/53/7/001. S2CID 122582479.

stsci.edu

mast.stsci.edu

"MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.

tophat.com

"OpenStax: Astronomy | 19.3 Variable Stars: One Key to Cosmic Distances | Top Hat". tophat.com. Retrieved 2020-04-15.

ucla.edu

cwp.library.ucla.edu

Turner, J (March 16, 2001). "Cecilia Helena Payne-Gaposchkin". Contributions of 20th Century Women to Physics. Archived from the original on October 12, 2012.

web.archive.org

Turner, J (March 16, 2001). "Cecilia Helena Payne-Gaposchkin". Contributions of 20th Century Women to Physics. Archived from the original on October 12, 2012.
Variable Star Of The Season, Winter 2005: The Beta Cephei Stars and Their Relatives Archived 2010-06-15 at the Wayback Machine, John Percy, AAVSO. Accessed October 2, 2008.

wiley.com

onlinelibrary.wiley.com

Hamacher, D.W. (2018). "Observations of red-giant variable stars by Aboriginal Australians". The Australian Journal of Anthropology. 29 (1): 89–107. arXiv:1709.04634. Bibcode:2018AuJAn..29...89H. doi:10.1111/taja.12257. hdl:11343/293572. S2CID 119453488.

zenodo.org

Porceddu, S.; Jetsu, L.; Lyytinen, J.; Kajatkari, P.; Lehtinen, J.; Markkanen, T.; et al. (2008). "Evidence of Periodicity in Ancient Egyptian Calendars of Lucky and Unlucky Days". Cambridge Archaeological Journal. 18 (3): 327–339. Bibcode:2008CArcJ..18..327P. doi:10.1017/S0959774308000395. S2CID 162969143.