Vu Duc Gioi, chief of tourist guides, Yok Don National Park
Database of domestic elephant in Dak Lak, Department of Forest Resource and Environment Management (FREM), Tay Nguyen University, Vietnam. (2009) Web site: http://www.socialforestry.org.vn
The current situation of elephants in Vietnam, by Cao Thi Ly, Tay Nguyen University, Vietnam, 2011
