Clack, J.A. (2009). „The fin to limb transition: New data, interpretations, and hypotheses from paleontology and developmental biology”. Annual Review of Earth and Planetary Sciences. 37 (1): 163—179. Bibcode:2009AREPS..37..163C. doi:10.1146/annurev.earth.36.031207.124146.
Clack, J.A. (2009). „The fin to limb transition: New data, interpretations, and hypotheses from paleontology and developmental biology”. Annual Review of Earth and Planetary Sciences. 37 (1): 163—179. Bibcode:2009AREPS..37..163C. doi:10.1146/annurev.earth.36.031207.124146.
Janvier, Philippe (1997-01-01). „Vertebrata: Animals with backbones”. tolweb.org (Version 01 January 1997 (under construction) изд.). The Tree of Life Web Project. Архивирано из оригинала 12. 03. 2013. г. Приступљено 15. 05. 2022.
Janvier, Philippe (1997-01-01). „Vertebrata: Animals with backbones”. tolweb.org (Version 01 January 1997 (under construction) изд.). The Tree of Life Web Project. Архивирано из оригинала 12. 03. 2013. г. Приступљено 15. 05. 2022.