W. K. . Sari, M. . Sofian, Y. A. . Putri, and R. W. P. M. . Camqliew, “Physical characterization of coconut fiber (cocos nucifera) and melinjo peel fiber (gnetum gnemon) for potential armor applications”, PSSJ, vol. 5, no. 9, pp. 356–363, Jan. 2026.