“First Order Derivative and Dual Wavelength Spectrophotometry Methods Development and Validation for Simultaneous Estimation of Alogliptin and Pioglitazone in Bulk and Dosage Form”. International Journal of Pharmaceutical Chemistry, vol. 4, no. 1, Mar. 2014, pp. 21-31, https://doi.org/10.7439/ijpc.v4i1.56.