M. Mylarappa, V. V. Lakshmi, K. V. Mahesh, H. Nagaswarupa, and N. Raghavendra, “Cyclic Voltammetry and Electrochemical Impedance Spectral Properties of MnO2 Obtained by Waste Discarded Batteries Using Eco-Friendly Leaching Materials”, ajc, vol. 29, no. 9, pp. 2016–2024, Jul. 2017.