Singh, P. K. ., D. . Singh, and R. K. . Bijauliya. “A Comprehensive Review on Buccal DrugDelivery System”. International Journal of Research and Development in Pharmacy & Life Sciences, vol. 6, no. 3, May 2017, pp. 2606-18, doi:10.21276/IJRDPL.2278-0238.2017.6(3).2606-2618.