Muhammad, Arif, Tirupathi Rao, and Qaiser Farooq. “DEA Window Analysis With Slack-Based Measure of Efficiency in Indian Cement Industry”. Statistics, Optimization & Information Computing 6, no. 2 (June 24, 2018): 292-302. Accessed November 22, 2024. http://iapress.org/index.php/soic/article/view/soic20180612.