Development, characterization and antioxidant activity of polysorbate based O/W emulsion containing polyphenols derived from Hippophae rhamnoides and Cassia fistula . Braz. J. Pharm. Sci. [Internet]. 2013 Dec. 1 [cited 2024 Jul. 22];49(4):763-7. Available from: https://journals.usp.br/bjps/article/view/76556