M. Nor Akmal Khalid, U. Kalsom Yusof, and Z. Fitri Zaaba, “An Artificial Immune System Approach for Type E Assembly Line Balancing Problem”, IJET, vol. 7, no. 4.31, pp. 220–227, Dec. 2018, doi: 10.14419/ijet.v7i4.31.23371.