@article{mihaylova_schalow_2013,  title={Antioxidant and stabilization activity of a quercetin-containing flavonoid extract obtained from Bulgarian Sophora japonica L.},  volume={56},  ISSN={1516-8913},  url={https://doi.org/10.1590/S1516-89132013000300011},  DOI={10.1590/S1516-89132013000300011},  number={3},  journal={Brazilian Archives of Biology and Technology},  publisher={Instituto de Tecnologia do Paraná - Tecpar},  author={Mihaylova, Dasha and Schalow, Sebastian},  year={2013},  month={May},  pages={431–438} }