@article{panda_kumar_mohanta_2013,  title={Stability-indicating RP-HPLC method for simultaneous estimation of levosalbutamol sulfate and theophylline in combined dosage form},  volume={49},  ISSN={1984-8250},  url={https://doi.org/10.1590/S1984-82502013000300009},  DOI={10.1590/S1984-82502013000300009},  number={3},  journal={Brazilian Journal of Pharmaceutical Sciences},  publisher={Universidade de São Paulo, Faculdade de Ciências Farmacêuticas},  author={Panda, Sagar Suman and Kumar, Bera Venkata Varaha Ravi and Mohanta, Ganeswar},  year={2013},  month={Jul},  pages={475–490} }