Hodianto, Valentinus Alvin, and Yang I-Tung. “MULTI-MODE RESOURCE CONSTRAINED MULTI PROJECT SCHEDULING PROBLEM OPTIMIZATION WITH SYMBIOTIC ORGANISMS SEARCH”. Dimensi Utama Teknik Sipil 9, no. 1 (April 27, 2022): 77–96. Accessed May 5, 2024. https://duts.petra.ac.id/index.php/duts/article/view/209.