HERNÁNDEZ-D., J., SARMIENTO, C.E. and FERNÁNDEZ H., C. 2009. Foraging activity of Polybia occidentalis venezuelana (Hymenoptera, Vespidae). Revista Colombiana de Entomología. 35, 2 (Dec. 2009), 230–234. DOI:https://doi.org/10.25100/socolen.v35i2.9224.