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Sex, drugs and animal parts: will Viagra save threatened species? von Hippel FA, von Hippel W., Environmental Conservation. vol. 29, page 277 (2002)
Diclofenac residues as the cause of vulture population decline in Pakistan. Oaks JL, et al., Nature. vol. 427, page 6975. (2004)
The Social Costs of Keystone Species Collapse: Evidence from the Decline of Vultures in India, Eyal Frank, Anant Sudarshan, American Economic Review, vol. 114, page 3007, (2024).