VILLEGAS, N. P., A. GAIGL, and L. F. VALLEJO-E. “The White Grub Complex (Coleoptera: Melolonthidae) Associated With Onion and Pasture in Risaralda, Colombia”. Revista Colombiana De Entomología, vol. 34, no. 1, June 2008, pp. 83-89, doi:10.25100/socolen.v34i1.9255.