Alagusundaram M., Chengaiah B., Gnanaprakash K., Ramkanth S., Madhusudhana Chetty C., and Dhachinamoorthi D. 2010. “Nasal Drug Delivery System - an Overview”. International Journal of Research in Pharmaceutical Sciences 1 (4):454-65. https://ijrps.com/home/article/view/2971.