References
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Wetzel, R M (1977a). "The extinction of peccaries and a new case of survival." Annals of the New York Academy of Science 288, 538–544.
Wetzel, R M (1977b). "The Chacoan peccary, Catagonus wagneri (Rusconi)." Bulletin of the Carnegie Museum of Natural History 3, 1–36.
Wetzel, R M, Dubos, R E, Martin, R L and Myers, P (1975). "Catagonus, an 'extinct' peccary alive in Paraguay." Science 189, 379–381.
