Selis, Marco. “The Genus Epsilon De Saussure in the Malay Archipelago (Hymenoptera: Vespidae: Eumeninae)”. Zootaxa 5845, no. 2 (July 6, 2026): 235–263. Accessed July 7, 2026. https://www.mapress.com/zt/article/view/zootaxa.5845.2.2.