Ram Chand Dhakar, Sheo Datta Maurya, Vijay K Tilak, and Anish K Gupta. “A Review on Factors Affecting the Design of Nasal Drug Delivery System”. International Journal of Drug Delivery, vol. 3, no. 2, June 2011, pp. 194-08, https://ijdd.arjournals.org/index.php/ijdd/article/view/69.