@article{khan_akhtar_khan_braga_2013,  title={Development, characterization and antioxidant activity of polysorbate based O/W emulsion containing polyphenols derived from Hippophae rhamnoides and Cassia fistula},  volume={49},  ISSN={1984-8250},  url={https://doi.org/10.1590/S1984-82502013000400016},  DOI={10.1590/S1984-82502013000400016},  number={4},  journal={Brazilian Journal of Pharmaceutical Sciences},  publisher={Universidade de São Paulo, Faculdade de Ciências Farmacêuticas},  author={Khan, Barkat Ali and Akhtar, Naveed and Khan, Haroon and Braga, Valdir de Andrade},  year={2013},  month={Oct},  pages={763–773} }