Sukto, Seekharin, and Peerayuth Charnsethikul. 2015. “List-Scheduling and Column-Generation for Scheduling of n Job-Groups with Set up Time through m Identical Parallel Machines to Minimize Makespan”. Engineering and Applied Science Research 32 (2):217-36. https://ph01.tci-thaijo.org/index.php/easr/article/view/42385.