First derivative spectrophotometric method for the simultaneous estimation of valsartan and hydrochlorthiazide in their combined dosage form. International Journal of Pharmacy and Life Sciences, [S. l.], v. 3, n. 7, p. 1828–1832, 2012. Disponível em: http://ijplsjournal.com/index.php/ijpls/article/view/812. Acesso em: 16 dec. 2025.