Ιχθυόστεγα (Greek Wikipedia)

Mosher, Dave (23 Μαΐου 2012). «Evolutionary Flop: Early 4-Footed Land Animal Was No Walker?». National Geographic News. Αρχειοθετήθηκε από το πρωτότυπο στις 25 Μαΐου 2012. Ανακτήθηκε στις 4 Νοεμβρίου 2013.

nature.com (Global: 234^th place; Greek: 207^th place)

Ahlberg, Per Erik; Clack, Jennifer A.; Blom, Henning (2005). «The axial skeleton of the Devonian tetrapod Ichthyostega» (στα αγγλικά). Nature 437 (7055): 137–140. doi:10.1038/nature03893. ISSN 1476-4687. PMID 16136143. Bibcode: 2005Natur.437..137A. https://www.nature.com/articles/nature03893.

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

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Stephanie E. Pierce; Jennifer A. Clack; John R. Hutchinson (2012). «Three-dimensional limb joint mobility in the early tetrapod Ichthyostega». Nature 486 (7404): 524–527. doi:10.1038/nature11124. PMID 22722854. Bibcode: 2012Natur.486..523P. http://researchonline.rvc.ac.uk/id/eprint/6182/.
Ahlberg, Per Erik; Clack, Jennifer A.; Blom, Henning (2005). «The axial skeleton of the Devonian tetrapod Ichthyostega» (στα αγγλικά). Nature 437 (7055): 137–140. doi:10.1038/nature03893. ISSN 1476-4687. PMID 16136143. Bibcode: 2005Natur.437..137A. https://www.nature.com/articles/nature03893.
Swartz, B. (2012). «A marine stem-tetrapod from the Devonian of Western North America». PLOS ONE 7 (3): e33683. doi:10.1371/journal.pone.0033683. PMID 22448265. Bibcode: 2012PLoSO...733683S.

pubmedcentral.nih.gov

Swartz, B. (2012). «A marine stem-tetrapod from the Devonian of Western North America». PLOS ONE 7 (3): e33683. doi:10.1371/journal.pone.0033683. PMID 22448265. Bibcode: 2012PLoSO...733683S.

paleofile.com (Global: low place; Greek: low place)

"Ichthyostega".

rvc.ac.uk (Global: low place; Greek: low place)

researchonline.rvc.ac.uk

Stephanie E. Pierce; Jennifer A. Clack; John R. Hutchinson (2012). «Three-dimensional limb joint mobility in the early tetrapod Ichthyostega». Nature 486 (7404): 524–527. doi:10.1038/nature11124. PMID 22722854. Bibcode: 2012Natur.486..523P. http://researchonline.rvc.ac.uk/id/eprint/6182/.

uio.no (Global: 2,613^th place; Greek: 5,717^th place)

foreninger.uio.no

Jarvik, Erik (15 April 1996). «The Devonian tetrapod Ichthyostega». Fossils and Strata 40: 1–206. doi:10.18261/8200376605-1996-01. ISBN 8200376605. https://foreninger.uio.no/ngf/FOS/pdfs/F&S_40.pdf.

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«Devonian Times – Tetrapods Answer». Αρχειοθετήθηκε από το πρωτότυπο στις 26 Ιουλίου 2021. Ανακτήθηκε στις 30 Δεκεμβρίου 2023.
Mosher, Dave (23 Μαΐου 2012). «Evolutionary Flop: Early 4-Footed Land Animal Was No Walker?». National Geographic News. Αρχειοθετήθηκε από το πρωτότυπο στις 25 Μαΐου 2012. Ανακτήθηκε στις 4 Νοεμβρίου 2013.

worldcat.org (Global: 5^th place; Greek: 8^th place)

Ahlberg, Per Erik; Clack, Jennifer A.; Blom, Henning (2005). «The axial skeleton of the Devonian tetrapod Ichthyostega» (στα αγγλικά). Nature 437 (7055): 137–140. doi:10.1038/nature03893. ISSN 1476-4687. PMID 16136143. Bibcode: 2005Natur.437..137A. https://www.nature.com/articles/nature03893.

Ιχθυόστεγα (Greek Wikipedia)

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