Macias-Macias, J. O.; Quezada-Euan, J.; Tapia-Gonzalez, J. M.; Conteras-Escareño, F. Nesting Sites, Nest Density and Spatial Distribution of Melipona Colimana Ayala (Hymenoptera: Apidae: Meliponini) in Two Highland Zones of Western, Mexico. Sociobiology 2014, 61, 423-427.