Ram Chand Dhakar, Sheo Datta Maurya, Vijay K Tilak, and Anish K Gupta. 2011. “A Review on Factors Affecting the Design of Nasal Drug Delivery System”. International Journal of Drug Delivery 3 (2):194-208. https://ijdd.arjournals.org/index.php/ijdd/article/view/69.