Nguyen, H. V., M. T. Nguyen, and L. T. P. Nguyen. “Discovery of the Male of Okinawepipona yty Nguyen, 2018 (Hymenoptera: Vespidae: Eumeninae) from Vietnam”. Zootaxa, vol. 5399, no. 1, Jan. 2024, pp. 79-84, doi:10.11646/zootaxa.5399.1.6.