Greene, Whitney, Ellen S. Dierenfeld, and Susan Mikota. 2019. “A Review of Asian and African Elephant Gastrointestinal Anatomy, Physiology, and Pharmacology: Elephant Gastrointestinal Anatomy, Physiology, and Pharmacology”. Journal of Zoo and Aquarium Research 7 (1):1-14. https://doi.org/10.19227/jzar.v7i1.329.