BioStor
 | The tribe Osirini, its scope, classification, and revisions of the genera Parepeolus and Osirinus (Hymenoptera, Apoidea, Anthophoridae) (1989) University of Kansas Science Bulletin 54: 1-23 |
 | Clave para los géneros de abejas de Chile (Hymenoptera: Apoidea) E Chiappa, M Rojas G-L and H Toro G (1990) Rev. Chilena Ent. 18: 67-81 |
 | Genus-group names of bees and supplemental family-group names Charles D Michener (1997) Scientific Papers Natural History Museum University of Kansas 1: 1-81 |