Phu-ang A, Jitkongchuen D. The Cluster Crossover Operation for The Symmetric Travelling Salesman Problem. ECTI-CIT Transactions [internet]. 2019 Feb. 18 [cited 2025 Apr. 26];12(2):98-105. available from: https://ph01.tci-thaijo.org/index.php/ecticit/article/view/132018