Phiphatsomporn, Patawee, and Pisut Pongchairerks. 2015. “Double Assembly Line Balancing Algorithms on Real-World Instances of Producing Digital Rice Cookers and Digital Hot Pots”. Progress in Applied Science and Technology 5 (2). Thailand:96-117. https://ph02.tci-thaijo.org/index.php/past/article/view/243183.