@article{martins_2012,  title={Leaf and calycine colleters in Odontadenia lutea (Apocynaceae - Apocynoideae - Odontadenieae): their structure and histochemistry},  volume={35},  ISSN={0100-8404},  url={https://doi.org/10.1590/S0100-84042012000100007},  DOI={10.1590/S0100-84042012000100007},  number={1},  journal={Brazilian Journal of Botany},  publisher={Sociedade Botânica de São Paulo},  author={Martins, Fabiano Machado},  year={2012},  pages={59–69} }