V. H. Gonzalez, R. I. Velez-Ruiz, and M. S. Engel, “A new paracolletine bee from Colombia (Hymenoptera: Colletidae), with an updated checklist of the tropical Andean bee fauna”, J. Melittol., no. 43, pp. 1–26, Dec. 2014, doi: 10.17161/jom.v0i43.4812.