Pillai N, Vijayamohanan, and AM Narayanan. “Measuring Energy Efficiency in Kerala: Data Envelopment Analysis”. British Journal of Healthcare and Medical Research 6, no. 4 (December 31, 2019): 16–28. Accessed April 25, 2024. https://journals.scholarpublishing.org/index.php/JBEMi/article/view/7629.