@article{sayeed_habib_rahman_banna_rana_2012,  title={In vitro study on the interaction of ketotifen fumarate with anhydrous theophylline},  volume={48},  ISSN={1984-8250},  url={https://doi.org/10.1590/S1984-82502012000200004},  DOI={10.1590/S1984-82502012000200004},  number={2},  journal={Brazilian Journal of Pharmaceutical Sciences},  publisher={Universidade de São Paulo, Faculdade de Ciências Farmacêuticas},  author={Sayeed, Mohammed Aktar and Habib, Razibul and Rahman, Mominur and Banna, Hasan Al and Rana, Sohel},  year={2012},  month={Apr},  pages={211–216} }