PEKKARINEN, A. Oligolectic bee species in Northern Europe (Hymenoptera, Apoidea). Entomologica Fennica, [S. l.], v. 8, n. 4, p. 205–214, 1997. DOI: 10.33338/ef.83945. Disponível em: https://journal.fi/entomolfennica/article/view/83945. Acesso em: 22 nov. 2024.