BioStor
 | Classification and phylogenetic relationships of the panurgine bees: the Calliopsini and allies (Hymenoptera: Andrenidae) (1991) University of Kansas Science Bulletin 54: 209-256 |
 | 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 |
 | A Revision of the Panurgine Bee Genus Arhysosage (Hymenoptera: Andrenidae) Michael S Engel (2000) Journal of Hymenoptera Research 9: 182-208 |