^Hemmer, H. (1990), Domestication: The Decline of Environmental Appreciation, Cambridge University Press, pp. 55-59, ISBN 0521341787
^Groves, C. (2008). Current views on the taxonomy and zoogeography of the genus Sus. pp. 15–29 in Albarella, U., Dobney, K, Ervynck, A. & Rowley-Conwy, P. Eds. (2008). Pigs and Humans: 10,000 Years of Interaction. Oxford University Press. ISBN 978-0-19-920704-6
^Groves, C. P. et al. 1993. The Eurasian Suids Sus and Babyrousa. In Oliver, W. L. R., ed., Pigs, Peccaries, and Hippos - 1993 Status Survey and Conservation Action Plan, 107-108. IUCN/SSC Pigs and Peccaries Specialist Group, ISBN 2-8317-0141-4
^ 5.05.1Oliver, W. L. R. et al. 1993. The Eurasian Wild Pig (Sus scrofa). In Oliver, W. L. R., ed., Pigs, Peccaries, and Hippos - 1993 Status Survey and Conservation Action Plan, 112-121. IUCN/SSC Pigs and Peccaries Specialist Group, ISBN 2-8317-0141-4