Slow rates of molecular evolution in birds and the metabolic rate and body temperature hypothesesv. 13No. 2SOC MOLECULAR BIOLOGY EVOLUTION422–426
Mindell, D. P., Knight, A., Baer, C., and Huddleston, Christopher J. 1996. "Slow rates of molecular evolution in birds and the metabolic rate and body temperature hypotheses." Molecular biology and evolution, 13, (2) 422–426.