Dathe, H. H. 2015: Studies on the systematics and taxonomy of the genus Hylaeus F. (9) Supplement to the taxonomy and distribution of Afrotropical Hylaeus F. species (Hymenoptera: Anthophila, Colletidae). - Beiträge Zur Entomologie = Contributions to Entomology 65(1): 9–26 - doi: 10.21248/contrib.entomol.65.1.9-26