“A Comparative Study of Carbon Surface Modification Routes: Gamma Irradiation and Aqueous Oxidation using H2O2 for Advanced Carbon/MnO2 Nanocomposite Supercapacitor Electrode”, J. Eng. Technol. Sci., vol. 58, no. 6, pp. 781–797, Sep. 2026, doi: 10.5614/j.eng.technol.sci.2026.58.6.3.