Goswami, N. ., and P. . Prajapati. “QUALITY BY DESIGN (QBD) TO OPTIMIZATION OF SEMI-SOLID SUSPENSION TYPE OF CAPTOPRIL TRANSDERMAL DRUG DELIVERY SYSTEM”. International Journal of Research and Development in Pharmacy & Life Sciences, vol. 5, no. 2, Mar. 2016, pp. 2023-38, https://ijrdpl.com/index.php/ijrdpl/article/view/215.