@article{reis_sajo_stehmann_2002,  title={Leaf Structure and Taxonomy of Petunia and Calibrachoa (Solanaceae)},  volume={45},  ISSN={1516-8913},  url={https://doi.org/10.1590/S1516-89132002000100010},  DOI={10.1590/S1516-89132002000100010},  number={1},  journal={Brazilian Archives of Biology and Technology},  publisher={Instituto de Tecnologia do Paraná - Tecpar},  author={Reis, Claudia dos and Sajo, Maria das Graças and Stehmann, João Renato},  year={2002},  month={Mar},  pages={59–66} }