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• Systematic studies of the subgenus Crewella of Ceratina (Hymenoptera, Apidae, Xylocopinae), with a revision of the species occurring in Argentina

  Arturo Roig Alsina

  135-170

  2022-05-25

• A revision of the bee genus Ceratina, subgenus Rhysoceratina (Hymenoptera, Apidae, Xylocopinae)

  A. Roig Alsina

  125-146

  2016-12-26