@article{nardi_pizzeghello_schiavon_ertani_2016,  title={Plant biostimulants: physiological responses induced by protein hydrolyzed-based products and humic substances in plant metabolism},  volume={73},  ISSN={0103-9016},  url={https://doi.org/10.1590/0103-9016-2015-0006},  DOI={10.1590/0103-9016-2015-0006},  number={1},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Nardi, Serenella and Pizzeghello, Diego and Schiavon, Michela and Ertani, Andrea},  year={2016},  month={Jan},  pages={18–23} }