@article{ramalho_2004,  title={Stingless bees and mass flowering trees in the canopy of Atlantic Forest: a tight relationship},  volume={18},  ISSN={0102-3306},  url={https://doi.org/10.1590/S0102-33062004000100005},  DOI={10.1590/S0102-33062004000100005},  number={1},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Ramalho, Mauro},  year={2004},  month={Jan},  pages={37–47} }