Zainuddin, Zainal Zahari; Hassan, M., 1989. Feed intake and digestibility of Ficus variegate in a captive Sumatran Rhinoceros at Zoo Melaka. Journal of Wildlife and Parks (Malaysia) 8: 112-116
Zainuddin, Zainal Zahari, 1987. Blood collection in the captive Sumatran Rhinoceros ( Dicerorhinus sumatrensis) at the Malacca Zoo. Journal of Wildlife and Parks (Malaysia) 6: 75-83
Zainuddin, Zainal Zahari, 1986. The world's smallest rhinoceros ( Dicerorhinus sumatrensis) in captivity. Journal of Wildlife and Parks (Malaysia) 5: 134