Do Melipona bicolor (Apidae, Meliponinae) workers distinguish relatedness among different physogastric queens? Wladimir J. Alonso, Tarcila Lucena, Carla M. Fracasso, Hayo H.W. Velthuis and Vera Lucia Imperatriz-Fonseca Apidologie, 29 6 (1998) 503-512 DOI: 10.1051/apido:19980603