Numerical investment in sex and caste by stingless bees (Apidae: Meliponini): a comparative analysis Pérsio de Souza Santos-Filho, Denise de Araujo Alves, André Eterovic, Vera Lucia Imperatriz-Fonseca and Astrid de Matos Peixoto KleinertApidologie, 37 2 (2006) 207-221DOI: https://doi.org/10.1051/apido:2006015
