@article{silva_toledo_vianna-soares_2017, title={Development and validation of alternative methods by non-aqueous acid-base titration and derivative ultraviolet spectrophotometry for quantification of sildenafil in raw material and tablets}, volume={53}, ISSN={1984-8250}, url={https://doi.org/10.1590/s2175-97902017000115181}, DOI={10.1590/s2175-97902017000115181}, number={1}, journal={Brazilian Journal of Pharmaceutical Sciences}, publisher={Universidade de São Paulo, Faculdade de Ciências Farmacêuticas}, author={Silva, Taízia Dutra and Toledo, Cibele Rodrigues and Vianna-Soares, Cristina Duarte}, year={2017}, pages={e15181} }