E. Taer, Apriwandi, E. N. T. Tambunan, N. Yanti, Nursyafni, and R. Taslim, “Oxygen-functionalized carbon nanofibers from kulim wood for high- performance supercapacitors via an integrated chemical–physical catalyst approach”, CST, vol. 10, no. 2, pp. 379–388, Dec. 2025.