1. The future of biodiversity.;SL Pimm;Science,1995
2. 2006 IUCN Red List of Threatened Species.;IUCN,2006
3. Biodiversity. Chapter 4 in: Millennium ecosystem assessment, 2005 Current state and trends: findings of the condition and trends working group Ecosystems and human well-being, vol1.;GM Mace,2005
4. What to protect-systematics and the agony of choice.;RI Vane-Wright;Biological Conservation,1991
5. The Noah's Ark Problem.;ML Weitzman;Econometrica,1998