Brown, J.W. and Razowski, J. 2003.

Description of Ptychocroca, a new genus from Chile and Argentina, with comments on the Bonagota Razowski group of genera (Lepidoptera: Tortricidae: Euliini)

. Zootaxa. 303, 1 (Sep. 2003), 1–31. DOI:https://doi.org/10.11646/zootaxa.303.1.1.