Koponen, Martti. “Two Species of <i>Trachyusa</I> Ruthe, 1854 (Hymenoptera, Braconidae, Alysiinae) in Finland”. Entomologica Fennica 10, no. 4 (December 1, 1999): 199–200. Accessed April 19, 2024. https://journal.fi/entomolfennica/article/view/84022.