1. Ahlberg, P. E., 1989, Paired fin skeletons and relationships of the fossil group Porolepiformes (Osteichthyes: Sarcopterygii), Zool. J. Linn. Soc. 96:119–166.
2. Andrews, S. M., and Westoll, T. S., 1970, The post-cranial skeleton of Eusthenopteron foordi Whiteaves, Trans. R. Soc. Edinburgh 68:297–321.
3. Balfour, F. M., 1881, On the development of the skeleton of the paired fins of Elasmobranchii, considered in relation to its bearings on the nature of the limbs of the Vertebrata, Proc. Zool Soc. London 1881:656–671.
4. Blanco, M., and Alberch, P., 1992, Caenogenesis, developmental variability and evolution of the carpus and tarsus of the marbled newt, Triturus marmoratus, Evolution 46:677–687.
5. Braus, H., 1901, Die Muskeln und Nerven der Ceratodusflosse. Ein Beitrag zur vergleichenden Morphologie der freien Gliedmasse bei niederen Fischen und zur Archipterygiumtheorie, Denkschr. Med.-Naturwiss. Ges. Jena 4:139–300.