Phan, Thuc Duy, Ockie J.H Bosch, Nam Cao Nguyen, and Tuyen Thanh Le. “Dynamics and Viability of the Critically Endangered Cat Ba Langur: A New Perspective for Conservation Actions”. Proceedings of the 57th Annual Meeting of the ISSS - 2013 HaiPhong, Vietnam 1, no. 1 (April 16, 2014). Accessed June 17, 2021. https://journals.isss.org/index.php/proceedings57th/article/view/2114.