1. Phylogenetic studies of the families of short-tongued bees (Hymenoptera: Apoidea);Alexander;Univ. Kansas Sci. Bul.,1995
2. Ascher, J.S., Pickering, J., 2012. Discover Life bee species guide and world checklist (Hymenoptera: Apoidea: Anthophila). Draft 34. 1, August, 2012. (accessed 04.01.12).
3. Nests and social behaviour of halictine bees of India (Hymenoptera: Halictidae);Batra;Indian J. Entomol.,1966
4. Evaluating alternative hypotheses for the early evolution and diversification of ants;Brady;Proc. Natl. Acad. Sci. USA,2006
5. Recent and simultaneous origins of eusociality in halictids bees;Brady;Proc. Royal Soc. B,2006