Sneh Lata, Pawan Jalwal, Jyoti Dahiya, Priti Mehndiratta, and Sangeet Sharma. “FORMULATION AND EVALUATION OF TIMOLOL MALEATE OPTHALAMIC GEL FORMING SOLUTION WITH CARRAGENAN AND DIFFERENT PRESERVATIVE SYSTEM”. International Journal of Pharma Professional’s Research (IJPPR), Vol. 6, no. 2, 1, pp. 1226-48, https://ijppronline.com/index.php/IJPPR/article/view/156.