Simultaneous estimation of atenolol and chlorthalidone in combine tablet dosage form by absorption ratio method using UV-Vis spectrophotometry. International Journal of Advances in Pharmaceutics, [S. l.], v. 3, n. 1, p. 19–27, 2014. DOI: 10.7439/ijap.v3i1.1416. Disponível em: https://ssjournals.co.in/index.php/ijap/article/view/1416. Acesso em: 16 feb. 2026.