C. A. ORTEGA-OJEDA, E. L. MELO-MOLINA, and A. GAIGL, “Lethal density of Phyllophaga menetriesi (Coleoptera: Melolonthidae) on cassava plants (Manihot esculenta)”, Rev. Colomb. Entomol., vol. 33, no. 1, pp. 17–20, Jun. 2007.