@article{silvestre_kolb_frei_santos_2013,  title={Phytotoxicity of organic extracts of Turnera ulmifolia L. and Turnera diffusa Willd. ex Schult. in cucumber seeds},  volume={27},  ISSN={0102-3306},  url={https://doi.org/10.1590/S0102-33062013000300003},  DOI={10.1590/S0102-33062013000300003},  number={3},  journal={Acta Botanica Brasilica},  publisher={Sociedade Botânica do Brasil},  author={Silvestre, Daniel Moreto and Kolb, Rosana Marta and Frei, Fernando and Santos, Catarina dos},  year={2013},  month={Jul},  pages={476–482} }