Vivallo, F. “Revision of the Bee Subgenus Centris (Wagenknechtia) Moure, 1950 (Hymenoptera: Apidae: Centridini)”. Zootaxa, vol. 3683, no. 5, July 2013, pp. 501–537, doi:10.11646/zootaxa.3683.5.1.