Sri Utami, Rika, Wai Yin Wong, Edy Herianto Majlan, and Kee Shyuan Loh. “Oxygen Reduction Reaction of Carbon Nanotubes Supported Polypyrrole Doped Toluene Sulfonic Acid in Alkaline Medium”. International Journal of Engineering & Technology 7, no. 4.14 (December 24, 2019): 473–477. Accessed December 20, 2024. https://sciencepubco.com/index.php/ijet/article/view/27721.