N. T. P. Lien, N. T. T. Ha, L. V. Tuan, D. H. Ngan, and C. T. T. Nga, “Study on solitary wasps of the subfamily Eumeninae (Hymenoptera: Vespidae) in Huu Lien and Na Hang nature reserves, with new records of one genus and three species”, AJB, vol. 40, no. 3, Nov. 2018.