T. Rajan, P. M. Sureshan, and P. G. Kumar, “Additions to the knowledge on the genus Carinostigmus Tsuneki (Hymenoptera: Crabronidae: Pemphredoninae) from the Indian subcontinent with the description of two new species”, Zootaxa, vol. 4881, no. 1, pp. 152–164, Nov. 2020.