Perilaku Harian Monyet Tonkean (Macaca tonkeana Meyer, 1899) Jantan yang Hidup secara Soliter di Gembira Loka Zoo, Yogyakarta = Daily Behavior of Solitary Male Tonkean Macaques (Macaca tonkeana Meyer, 1899) at Gembira Loka Zoo, Yogyakarta

Pengasuhan anak pada keluarga macaca hecki matschie, 1901 di Taman Margasatwa Ragunan, Jakarta = Parenting of macaca hecki Matschie, 1901 Family at Taman Margasatwa Ragunan, Jakarta

Interaksi Sosial dan Reproduksi Lutung Jawa (Trachypithecus auratus E. Geoffroy, 1812) Jantan dan Betina di Gembira Loka Zoo, Yogyakarta = Social and Reproductive Interaction of Male and Female Javan Langurs (Trachypithecus auratus E. Geoffroy, 1812) at Gembira Loka Zoo, Yogyakarta

Interaksi Siamang (Symphalangus syndactylus Raffles, 1821) Jantan dan Betina serta Pengaruh Duet Vokalisasi Siamang di Zona Primata Gembira Loka Zoo Yogyakarta = Interaction of Male and Female Siamang (Symphalangus syndactylus Raffles, 1821) and the Influence of Siamang Vocalization Duets in the Primate Zone of Gembira Loka Zoo, Yogyakarta

Studi Interaksi Antarberuang Madu (Helarctos malayanus) di Kandang Peraga Kebun Binatang Gembira Loka, Yogyakarta = The Study of Sun Bear Interaction (Helarctos malayanus) in an Enclosure at Gembira Loka Zoo, Yogyakarta