Ovariole structure and oogenesis in queens and workers of the stingless bee Melipona quadrifasciata (Hymenoptera: Apidae, Meliponini) kept under different social conditions Érica Donato Tanaka, Weyder Cristiano Santana and Klaus HartfelderApidologie, 40 2 (2009) 163-177DOI: https://doi.org/10.1051/apido/2008071
