WILLE, A. A general review of the fossil stingless bees. Revista de Biología Tropical, [S. l.], v. 25, n. 1, p. 43–46, 1977. Disponível em: https://revistas.ucr.ac.cr/index.php/rbt/article/view/25845. Acesso em: 19 apr. 2024.