A. Helida, W. Hadi Kurnia, and A. Sunjaya Adhikerana, “Sumatera Elephant Daily Behaviour (Elephas Maximus Sumatranus, Temminck, 1847) in Elephant’s Sub Training Center Line 21 Banyuasin District, Sumatera Selatan Province, Indonesia”, IJSBAR, vol. 45, no. 1, pp. 94–100, Mar. 2019.