F. VALLEJO, M. A. MORÓN, and S. ORDUZ, “First report and description of Phyllophaga obsoleta Blanchard (Coleoptera: Scarabaeoidea, Melolonthidae) in Colombia”, Rev. Colomb. Entomol., vol. 23, no. 1, pp. 1–7, Jan. 1997, doi: 10.25100/socolen.v23i1.9861.