Liu, Ting-Ting, Guang-Jie Shao, Ming-Tong Ji, and Zhi-Peng Ma. “Research Progress in Nano-Structured MnO2 As Electrode Materials for Supercapacitors: A Review”. Asian Journal of Chemistry 25, no. 13 (July 19, 2013): 7065–7070. Accessed May 2, 2024. https://asianpubs.org/index.php/ajchem/article/view/25_14_1.