1. Background and mass extinctions: the alternation of macroevolutionary regimes;Jablonski;Science,1986
2. Extinction;Stanley,1987
3. The Sinking Ark;Myers,1979
4. Dynamics of Extinction;Elliot,1986
5. CITES: Convention on International Trade in Endangered Species of Wild Flora and Fauna, part of the 1973 Endangered Species Act. Public Law 93-205, Title 50, Part 23.