Lopez-Osorio, F., Perrard, A., Pickett, K. M., Carpenter, J. M., & Agnarsson, I. (2015). Phylogenetic tests reject Emery's rule in the evolution of social parasitism in yellowjackets and hornets (Hymenoptera: Vespidae, Vespinae). R Soc Open Sci.

Lopez-Osorio, Federico, Adrien Perrard, Kurt M. Pickett, James M. Carpenter, ja Ingi Agnarsson. "Phylogenetic Tests Reject Emery's Rule in the Evolution of Social Parasitism in Yellowjackets and Hornets (Hymenoptera: Vespidae, Vespinae)." R Soc Open Sci 2015.

Lopez-Osorio, Federico, et al. "Phylogenetic Tests Reject Emery's Rule in the Evolution of Social Parasitism in Yellowjackets and Hornets (Hymenoptera: Vespidae, Vespinae)." R Soc Open Sci 2015.