@article{barreyro_sánchez vallduvi_2002,  title={Delimitacion del periodo critico de competencia de malezas en el cultivo de lino (Linum usitatissimum)},  volume={20},  ISSN={0100-8358},  url={https://doi.org/10.1590/S0100-83582002000300010},  DOI={10.1590/S0100-83582002000300010},  number={3},  journal={Planta Daninha},  publisher={Sociedade Brasileira da Ciência das Plantas Daninhas },  author={Barreyro, R.A. and Sánchez Vallduvi, G.E.},  year={2002},  month={Dec},  pages={399–403} }