Phruksaphanrat, B., and S. Jarernsuk. “Fuzzy Goal Programming Approach for Multi-Objective Multi-Mode Resource Constrained Project Scheduling Problem”. Engineering and Applied Science Research, vol. 41, no. 2, Sept. 2014, pp. 221-30, https://ph01.tci-thaijo.org/index.php/easr/article/view/21793.