L. Sa’adu, S. B. Muhammad, Abdullahi, I., S. B. Muhammad, A. B. Isah, and Y. Yusuf. “Metal-Based Oxides/Hydroxides and Conducting Polymers As Materials for Ultracapacitors – A Simple Communication”. International Journal of Science for Global Sustainability 8, no. 2 (July 13, 2022): 3. Accessed November 19, 2025. https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/336.