Karna, S., S. Chaturvedi, V. Agrawal, and M. Alim. “FORMULATION APPROACHES FOR SUSTAINED RELEASE DOSAGE FORMS: A REVIEW”. Asian Journal of Pharmaceutical and Clinical Research, vol. 8, no. 5, Sept. 2015, pp. 34-41, https://journals.innovareacademics.in/index.php/ajpcr/article/view/7185.