“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, vol. 3, no. 1, Mar. 2014, pp. 19-27, https://doi.org/10.7439/ijap.v3i1.1416.