O. Asri Widyayanti, C. F. A. . Mohtar, and A. . Jaman, “Adsorbent effectiveness of α-cellulose/humatic acid with epichlorohydrin cross-linking agent on methyl orange dye”, J. Pijar.MIPA, vol. 18, no. 6, pp. 999–1005, Nov. 2023.