1. Was ist Apis (Nomada) ferruginata L;ALFKEN;? Mitteilungen der Deutschen entomologischen Gesellschaft,1931
2. ANDRÉ , E. 1902 Spècies des Hyménoptères ďEurope et ďAlgérie, Tome 8, Mutillidae
3. The Psarrunocharidae (olim Pompilidae) of die Ethiopian region. Part 1. Subfamily Pepsinae;ARNOLD;Annals of the Transvaal Museum,1932
4. Classification of die fossorial, predaceous and parasitic wasps, or die superfamily Vespoidea;ASHMEAD;Canadian Entomologist,1900
5. A revision of the Vespidae of die Belgian Congo based on die collection of die American Museum Congo Expedition, with a list of Ethiopian Diplopterous wasps;BEQUAERT;Bulletin of the Ameran Museum of Natural History,1918