1. Review of genus-group taxa included in the genus Tychius Germar (Coleoptera: Curculionidae)
2. A taxonomic revision of the weevil genus Tychius Germar in America north of Mexico (Coleoptera: Curculionidae);Clark;Brigham Young University Science Bulletin, Biological Series,1971
3. Annotated Checklist of Weevils (Curculionidae sensu lato) of North America, Central America, and the West Indies (Coleoptera: Curculionoidea);O'Brien;Memoirs of the American Entomological Institute,1982
4. Bionomics of the Clover Seed Weevil, Miccotrogus picirostris (Fabricius), in Southeastern Washington and Adjacent Idaho;Yunus;Washington Agricultural Experiment Station Technical Bulletin,1967
5. Annotated Checklist of the Weevils (Curculionidae senu lato) of North America, Central America, and the West Indies (Coleoptera: Curculionoidea) – Supplement 1;O'Brien;Southwestern Entomologist,1984