Muenvanichakul, Sirirat, and Peerayuth Charnsethikul. “The Approximated Dynamic Programming Approach to the Dynamic Quadratic Assignment Problem”. Science & Technology Asia 12, no. 2 (1): 18-27. Accessed March 31, 2020. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41515.