Sereno, P.; Tan, L.; Brusatte, S. L.; Kriegstein, H. J.; Zhao, X. & Cloward, K. (2009). “Tyrannosaurid skeletal design first evolved at small body size”. Science326 (5951): 418–422. doi:10.1126/science.1177428. PMID19762599.
Sereno, P.; Tan, L.; Brusatte, S. L.; Kriegstein, H. J.; Zhao, X. & Cloward, K. (2009). “Tyrannosaurid skeletal design first evolved at small body size”. Science326 (5951): 418–422. doi:10.1126/science.1177428. PMID19762599.