1. Folkens P, Reeves R, Stewart B, et al. Guide to Marine Mammals of the World. Alfred A. Knopf, Inc., New York, USA and Random House of Canada, Limited, Toronto, Canada, 2002
2. Gao A, Zhou K. Geographical variation of external measurements and three subspecies of Neophocaena phocaenoides in Chinese waters. Acta Theriol Sin, 1995, 15: 81–92
3. Turvey S T, Pitman R L, Taylor B L, et al. First human-caused extinction of a cetacean species? Biol Lett, 2007, 3: 537–540
4. Baillie J, Groombridge B, eds. IUCN Red List of Threatened Animals. Switzerland: IUCN, Gland, 1996
5. Wang D, Zhang X, Liu R. Conservation status and its future of baiji and Yangtze finless porpoise in China. In: Hua Z L, Fu B, Yang Y, eds. Ecology and Environmental Protection of Large Irrigation Projects in Yangtze River in 21st Century. Beijing: Environmental Science Press, 1998. 218–226