@article{al-sherif_hegazy_gomaa_hassan_2013,  title={Allelopathic effect of black mustard tissues and root exudates on some crops and weeds},  volume={31},  ISSN={0100-8358},  url={https://doi.org/10.1590/S0100-83582013000100002},  DOI={10.1590/S0100-83582013000100002},  number={1},  journal={Planta Daninha},  publisher={Sociedade Brasileira da Ciência das Plantas Daninhas },  author={Al-Sherif, E and Hegazy, A.K. and Gomaa, N.H. and Hassan, M.O.},  year={2013},  month={Jan},  pages={11–19} }