BioStor
 | A monograph on fossil bees (Hymenoptera: Apoidea) F E Zeuner and F J Manning (1976) Bulletin of The British Museum (Natural History), Geology 27: 149-268 |
 | Classification of the Apidae (Hymenoptera) Charles D Michener (1990) University of Kansas Science Bulletin 54(4): 75-164 |
 | 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 new species of the Baltic amber bee genus Electrapis (Hymenoptera: Apidae) M S Engel (1998) Journal of Hymenoptera Research 7: 94-101 |
 | Case 3124. Apis proava Menge, 1856 (currently Electrapis proava; Insecta, Hymenoptera): proposed conservation by designation of a neotype M S Engel (1999) Bulletin of Zoological Nomenclature 56: 134-135 |