Amit Gupta, Ram S. Gaud, and S. Ganga. “Development, Evaluation and Optimization of Extended Release Buccal Tablets Prepared Using Progressive Hydration Technology”. International Journal of Drug Delivery, vol. 2, no. 1, Mar. 2010, pp. 37-48, https://ijdd.arjournals.org/index.php/ijdd/article/view/10.