Songserm, Watchara, Teeradej Wuttipornpun, and Chorkaew Jaturanonda. 2018. “Hybrid Metaheuristics and Linear Programming for Finite Capacity MRP in Multi- Stage Flexible Flow Shop With Permutation and Non-Permutation Scheduling Options”. Applied Science and Engineering Progress 11 (3):173-83. https://ph02.tci-thaijo.org/index.php/ijast/article/view/211333.