Vikberg, Veli. “<i>Crossocerus assimilis</i> and <i>Bethylus boops</I>, Two Aculeate Wasps New to the Fauna of Finland (Hymenoptera, Crabronidae and Bethylidae)”. Entomologica Fennica 10, no. 4 (December 1, 1999): 245–246. Accessed November 22, 2024. https://journal.fi/entomolfennica/article/view/84031.