W. E.  Clark, ?Revision of the weevil genus Lignyodes Dejean (Coleoptera: Curculionidae) in America north of Mexico.  ?, Transactions of the American Entomological Society (Philadelphia), vol. 106, pp. 273-326, 1980.

W. E.  Clark, ?Revision of the weevil genus Neotylopterus Hustache (Coleoptera: Curculionidae).?, Annals of the Entomological Society of America , vol. 73, pp. 216-230, 1980.

W. E.  Clark, ?Additions to the Neotropical weevil genus Rosella Whitehead (Coleoptera: Curculionidae): R. triophori (Gyllenhal), n. comb., transferred from Lignyodes Dejean, and R. arcuata, n. sp. ?, Coleopterists Bulletin , vol. 34, pp. 299-304, 1980.

P. A.  Angelov, ?[Coleoptera, Curculionidae. Part 4. Calandrinae. 2.]?, Fauna na Bulgariya, pp. 1-301, 1980.