J. O. Macias-Macias, J. Quezada-Euan, J. M. Tapia-Gonzalez, and F. Conteras-Escareño, “Nesting sites, nest density and spatial distribution of Melipona colimana Ayala (Hymenoptera: Apidae: Meliponini) in two highland zones of western, Mexico”, Sociobiology, vol. 61, no. 4, pp. 423–427, Dec. 2014.