M. Naga Prathibha, Shubhrajit Mantry, and S.Anil Kumar. “DRUG DELIVERY TO RESPIRATORY SYSTEM: A REVIEW”. INTERNATIONAL JOURNAL OF INNOVATIVE PHARMACEUTICAL SCIENCES AND RESEARCH 1, no. 4 (April 3, 2013): 409–428. Accessed June 1, 2023. https://ijipsr.com/index.php/IJIPSR/article/view/1158.