Pradeep Kumar Rao, J., H. N. Nagamani, V. Vaidhyanathan, and T. Bhavani Shanker. “A Study on Preliminary Screening of 12 V/ 2500 F Range Lead Carbon Hybrid Ultracapacitors As Energy Storage Device for Solar Power Applications”. Power Research - A Journal of CPRI, Sept. 2017, pp. 503-10, https://node6473.myfcloud.com/~geosocin/CPRI/index.php/pr/article/view/104.