KERR, W. E.; CUNHA, R. A. da. Taxonomic position of two fossil social bees (Apidae). Revista de Biología Tropical, [S. l.], v. 24, n. 1, p. 35–43, 1976. Disponível em: https://revistas.ucr.ac.cr/index.php/rbt/article/view/25968. Acesso em: 19 oct. 2024.