Yadav, RK, et al. “Physico-Chemical Evaluation of Gastroretentive Ranitidine Hydrochloride: An Anti-Ulcer Drug”. Janaki Medical College Journal of Medical Science, vol. 3, no. 2, Nov. 2016, pp. 4-12, doi:10.3126/jmcjms.v3i2.16075.