Wittemyer, G., Northrup, J. M., Blanc, J., Douglas-Hamilton, I., Omondi, P., & Burnham, K. P. (2014). Illegal killing for ivory drives global decline in African elephants. Proc Natl Acad Sci U S A.

Wittemyer, George, Joseph M. Northrup, Julian Blanc, Iain Douglas-Hamilton, Patrick Omondi, e Kenneth P. Burnham. "Illegal Killing for Ivory Drives Global Decline in African Elephants." Proc Natl Acad Sci U S A 2014.

Wittemyer, George, et al. "Illegal Killing for Ivory Drives Global Decline in African Elephants." Proc Natl Acad Sci U S A 2014.