Pradeep Kumar Rao, J., H. N. Nagamani, V. Vaidhyanathan, and T. Bhavani Shanker. “Charge-Discharge Behaviour of Lead Acid Battery and Lead Carbon Hybrid Ultracapacitors As Anintegrated System for Solar Power Applications”. Power Research - A Journal of CPRI, Sept. 2017, pp. 517-24, https://node6473.myfcloud.com/~geosocin/CPRI/index.php/pr/article/view/106.