Pham, P.H. and Girish Kumar, P. 2015. Biogeography and Distribution Pattern of Solitary Wasps from Vietnam (Hymenoptera : Vespidae : Eumeninae). Records of the Zoological Survey of India. 115, 2 (Jun. 2015), 171–177. DOI:https://doi.org/10.26515/rzsi/v115/i2/2015/120722.