A-A KHAMMAS, Zuhair. Extraction and Determination of Sildenafil Citrate by Spectrophotometry: Classical Versus Factorial Design Optimization. Tikrit Journal of Pharmaceutical Sciences, [S. l.], v. 9, n. 1, p. 61–79, 2023. DOI: 10.25130/tjphs.2013.9.1.7.61.79. Disponível em: https://tjphs.tu.edu.iq/index.php/j/article/view/273. Acesso em: 23 nov. 2024.