Prof. (Dr.) Tapan Kumar Nayak, Prof. (Dr.) P Sivakumar, , V Vijayalalitha, Prof. (Dr.) J. K. Sharma,. “Measurement of Total Factor Productivity in Indian Pharmaceutical Industry: An Application of Data Envelopment Analysis”. Design Engineering (October 29, 2021): 8331-8347. Accessed May 4, 2024. http://thedesignengineering.com/index.php/DE/article/view/5875.