@article{tiwari_srivastava_tiwari_rai_2009, title={Extended release promethazine HCl using acrylic polymers by freeze-drying and spray-drying techniques: formulation considerations}, volume={45}, ISSN={1984-8250}, url={https://doi.org/10.1590/S1984-82502009000400029}, DOI={10.1590/S1984-82502009000400029}, number={4}, journal={Brazilian Journal of Pharmaceutical Sciences}, publisher={Universidade de São Paulo, Faculdade de Ciências Farmacêuticas}, author={Tiwari, Ruchi and Srivastava, Birendra and Tiwari, Gaurav and Rai, Awanik}, year={2009}, month={Oct}, pages={829–840} }