@article{machado_pacheco_carvalho_2014,  title={Effect of biostimulant application on production and flavonoid content of marigold (Calendula officinalis L.)},  volume={61},  ISSN={0034-737X},  url={https://doi.org/10.1590/0034-737X201461060014},  DOI={10.1590/0034-737X201461060014},  number={6},  journal={Revista Ceres},  publisher={Universidade Federal de Viçosa},  author={Machado, Vivian Pupo de Oliveira and Pacheco, Ana Claudia and Carvalho, Marcia Eugenia Amaral},  year={2014},  month={Nov},  pages={983–988} }