Maharjan, R., and G. Subedi. “FORMULATION AND EVALUATION OF FLOATING IN SITU GEL OF RANITIDINE USING NATURAL POLYMERS”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 6, no. 10, Oct. 2014, pp. 205-9, https://www.innovareacademics.in/journals/index.php/ijpps/article/view/2186.