Matdoan, M. Y., A. Talakua, M. Marsono, D. Safira, A. Suriaslan, M. Zulfadhli, and A. Rukua. “Application of Demerit Chart and Fuzzy Demerit Chart for Monitoring Paper Production”. Pattimura International Journal of Mathematics (PIJMath), Vol. 3, no. 2, Nov. 2024, pp. 77-86, doi:10.30598/pijmathvol3iss2pp77-86.