AliFaez Hassan, and JassimSajad Majeed. “New Improved Heuristic Method for Solving Travelling Salesman Problem”. Iraqi Journal of Science 59, no. 4C (December 26, 2018): 2289-2300. Accessed August 9, 2020. http://scbaghdad.edu.iq/eijs/index.php/eijs/article/view/555.