Jagatp, Sneha R., and Omprakash G. Bhusnure. “A Review on Eight System Inspection Model”. Journal of Drug Delivery and Therapeutics 9, no. 4 (July 15, 2019): 713-719. Accessed May 19, 2022. http://www.jddtonline.info/index.php/jddt/article/view/3140.