Padian, Kevin; Lindberg, David R.; Polly, Paul David (May 1994). "Cladistics and the fossil record: The uses of history". Annual Review of Earth and Planetary Sciences22 (1): 63–89. doi:10.1146/annurev.ea.22.050194.000431. Bibcode: 1994AREPS..22...63P.
Kemp, T.S. (January 1988). "Haemothermia or Archosauria? The interrelationships of mammals, birds and crocodiles". Zoological Journal of the Linnean Society92 (1): 67–104. doi:10.1111/j.1096-3642.1988.tb01527.x.
Padian, Kevin; Lindberg, David R.; Polly, Paul David (May 1994). "Cladistics and the fossil record: The uses of history". Annual Review of Earth and Planetary Sciences22 (1): 63–89. doi:10.1146/annurev.ea.22.050194.000431. Bibcode: 1994AREPS..22...63P.