Rosnina, Y.; Choong, S.S.; Zainuddin, Z.Z.; Wahid, H.; Aidi, M.; Yap, K.C. 2000. Correlation between vaginal cytology and serum progesterone in Sumatran rhinoceros (Dicerorhinus sumatrensis). UPM Research Report 1997-2000, Section 2-Extended Abstracts: 204-205.
Choong, S.S.; Rosnina, Y.; Zainuddin, Z.Z.; Wahid, H. 2000. A preliminary study on exfoliative vaginal cytology in captive Sumatran rhinoceros (Dicerorhinus sumatrensis). UPM Research Report 1997-2000, Section 2-Extended Abstracts: 37.
Zainuddin, Z.Z.; Aidi, M.; Choong, S.S.; Romo, S.; Shariff, M. 1999. Blood collection techniques in the badak kerbau Dicerorhinus sumatrensis in Sungai Dusun Rhino Conservation Centre. Journal of Wildlife and Parks (Malaysia) 17: 116-120, pl. 1, table 1.






