1. The Kingdon Field Guide to African Mammals;Kingdon,1997
2. The Giraffe: Its Biology, Behavior, and Ecology;Dagg,1976
3. East African Mammals;Kingdon,1982
4. R. East, ASG co-chair, African Antelope Database, IUCN/SSC Antelope Specialist Group Report, 1998
5. H. Boulet, E.H.I. Niandou, M. Alou, D. Dulieu, B. Chardonnet, Giraffes (Giraffa camelopardalis peralta) of Niger, in: B. Chardonnet, P. Chardonnet (Eds.), Antelope Survey Update, No. 9, IUCN/SSC Antelope Specialist Group Report, 2004, pp. 36–39