Liu, Y.-J., Zhao, T.-R., Zhang, X.-W., Liang, C. and Zhao, F.-Y. 2013. Melittopalynology and Trophic niche analysis of Apis cerana and Apis mellifera in Yunnan Province of Southwest China. Sociobiology. 60, 3 (Nov. 2013), 289–294. DOI:https://doi.org/10.13102/sociobiology.v60i3.289-294.