HUFLEJT, Tomasz; GUTOWSKI, Jerzy. Xylocopa valga Gerst. (Hymenoptera: Apidae) w Polsce. Leśne Prace Badawcze, [S. l.], v. 77, n. 4, p. 341–351, 2016. DOI: 10.1515-frp-2016-0035. Disponível em: https://lpb-ibl.sggw.edu.pl/article/view/11664. Acesso em: 8 cze. 2026.