Perbezaan antara semakan "Spesies terancam"

*Kotiaho, J. S., Kaitala, V., Komonen, A., Päivinen, J. P., & Ehrlich, P. R. (2005, February 8). [http://www.jstor.org/stable/3374545 Predicting the Risk of Extinction from Shared Ecological Characteristics], proceedings of the National Academy of Sciences of the United States of America, 102(6), 1963-1967. Retrieved September 24, 2008
*Minteer, B. A., & Collins, J. P. (2005, August). [http://www.jstor.org/stable/3868567 Why we need an “Ecological Ethics”.]
* Frontiers in Ecology and the Environment, 3(6), 332-337. Retrieved September 22, 2008
*Raloff, J. (2006, August 5). [http://www.jstor.org/stable/4017054 Preserving Paradise], [[Science News]], 170(6), 92. Retrieved September 22, 2008,
*Wilcove, D. S., & Master L. L. (2008, October). [http://www.jstor.org/stable/3868674 How Many Endangered Species are there in the United States?] Frontiers in Ecology and the Environment, 3(8), 414-420. Retrieved September 22, 2008.