Papas, A.M.; Cambre, R.; Citino, S.B.; Sokol, R.J. 1991. Efficacy of absorption of various vitamin E forms by captive elephants and black rhinoceroses. Journal of Zoo and Wildlife Medicine 22: 309-317, figs. 1-3, table 1.
Papas, A.M.; Citino, S.B.; Cambre, R. 1990. Vitamin E: Considerations in practical animal feeding and case studies with elephants and rhinoceroses. Proceedings of the 8th Dr. Scholl Conference on the Nutrition of captive wild animals 1989: 59-68, 4 figures.






