Tham khảo Quy_tắc_Cope

    • Rensch, B. (September 1948). "Histological Changes Correlated with Evolutionary Changes of Body Size". Evolution. 2 (3): 218–230. doi:10.2307/2405381. JSTOR 2405381.
    • Hone DW; Benton MJ (2005). "The evolution of large size: how does Cope's Rule work?". Trends in Ecology and Evolution. 20 (1): 4–6. doi:10.1016/j.tree.2004.10.012. PMID 16701331.
    • Van Valkenburgh, B.; Wang, X; Damuth, J (2004). "Cope's Rule, Hypercarnivory, and Extinction in North American Canids". Science. 306 (5693): 101–4.