TY - JOUR TI - Analysis of the niche of two sympatric species of bombus ( hymenoptera , apidae) in southeastern brazil PY - 1989 AU - Camillo, E AU - Garofalo, C A T2 - Journal of Tropical Ecology DO - 10.1017/s0266467400003242 UR - https://doi.org/10.1017/s0266467400003242 VL - 5 SP - 81-92 ER -