Gonzalez VH, Griswold T, Simões M (2017) On the identity of the adventive species of Eufriesea Cockerell in the USA: systematics and potential distribution of the coerulescens species group (Hymenoptera, Apidae). Journal of Hymenoptera Research 55: 55-102. https://doi.org/10.3897/jhr.55.12209
Roberts, Donald R.; Alecrim, Wilson D.; Heller, Jack M.; Ehrhardt, Susan R.; Lima, Jose B. (6 May 1982). "Male Eufriesia purpurata, a DDT-collecting euglossine bee in Brazil". Nature. 297 (5861): 62–63. Bibcode:1982Natur.297...62R. doi:10.1038/297062a0. S2CID4257709.
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Roberts, Donald R.; Alecrim, Wilson D.; Heller, Jack M.; Ehrhardt, Susan R.; Lima, Jose B. (6 May 1982). "Male Eufriesia purpurata, a DDT-collecting euglossine bee in Brazil". Nature. 297 (5861): 62–63. Bibcode:1982Natur.297...62R. doi:10.1038/297062a0. S2CID4257709.
Roberts, Donald R.; Alecrim, Wilson D.; Heller, Jack M.; Ehrhardt, Susan R.; Lima, Jose B. (6 May 1982). "Male Eufriesia purpurata, a DDT-collecting euglossine bee in Brazil". Nature. 297 (5861): 62–63. Bibcode:1982Natur.297...62R. doi:10.1038/297062a0. S2CID4257709.