Physiological and genetic mechanisms underlying caste development, reproduction and division of labor in stingless bees - Hartfelder, Klaus; Maker, Gustavo R.; Judice, Carla C.; Pereira, Gonçalo A. G.; Santana, Weyder C.; Dallacqua, Rodrigo; Bitondi, Márcia Maria Gentile (Apidologie, 2006)