1. Acharya, R., R. Cuthbert, H.S. Baral, and K.B. Shah. 2009. Rapid population declines of Himalayan Griffon Gyps himalayensis in Upper Mustang, Nepal. Bird Conservation International 19: 99–107.
2. Acharya, R., R. Cuthbert, H.S. Baral, and A. Chaudhary. 2010. Rapid decline of the Bearded Vulture Gypaetus barbatus in Upper Mustang, Nepal. Forktail 26: 117–120.
3. Ali, S., and S.D. Ripley. 1978. Handbook of the birds of India and Pakistan, vol. 1, 2nd ed., 481. New Delhi: Oxford University Press.
4. Ali, S., and S.D. Ripley. 1983. Handbook of the birds of India and Pakistan: Together with those of Bangladesh Nepal, Bhutan and Sri Lanka: Compact Edition, 1–737. New Delhi: Oxford University Press.
5. Ali, S., and S.D. Ripley. 1987. Compact handbook of birds of India and Pakistan, 1–841. New Delhi: Oxford University Press.