Stability indicating method development and validation for simultaneous estimation of atorvastatin calcium and celecoxib in bulk and niosomal formulation by RP-HPLC . Braz. J. Pharm. Sci. [Internet]. 2015 Sep. 1 [cited 2024 Jul. 22];51(3):653-61. Available from: https://revistas.usp.br/bjps/article/view/107870