D. Lan

Environment and time as constraints on the biogeographical distribution of gibbons

Robin I. M. Dunbar, J. Lehmann, G. Cowlishaw, 2019, American journal of primatology.

Southwest China, the last refuge of continental primates in East Asia

Zhipang Huang, S. Guo, C. Oxnard, 2022, Biological Conservation.

Feeding and vocal behaviours of black gibbons (Hylobates concolor) in Yunnan: a preliminary study.

D. Lan, 1993, Folia primatologica; international journal of primatology.