BioStor
 | Classification of the Ichneumon flies, or the superfamily Ichneumonoidea Willam H Ashmead (1900) Proceedings of the U.S. National Museum 23(1206): 1-220 |
 | Type species of the genera of ichneumon flies H L Viereck (1914) Bulletin of the United States National Museum 83: 1-186 |
 | A revision of the North American Ichneumon-flies of the subfamily Opiinae A B Gahan (1915) Proceedings of the United States National Museum 49: 63-95 |
 | First supplement to "Type Species of the Genera of Ichneumon-flies" Henry L Viereck (1921) Proceedings of The United States National Museum 59(2364): 129-150 |
 | The Species of Sternaulopius Fischer (Hymenoptera: Braconidae, Opiinae) and the Braconid Sternaulus Robert A Wharton (2006) Journal of Hymenoptera Research 15: 317-347 |