Parizotto, D. R. and Urban, D. (2013) “Contribution to the knowledge of the Anthidulum Michener and Ctenanthidium Urban (Hymenoptera, Apidae) with new species from Argentina and Peru”, Zootaxa. Auckland, New Zealand, 3609(3), pp. 311–318. doi: 10.11646/zootaxa.3609.3.5.