P. Z. Siow and S. C. Lee, “Solving the N-puzzle with Iterative Deepening A* (IDA*) Algorithm”, EKST, vol. 3, no. 1, pp. 097–107, Aug. 2023, Accessed: May 20, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/10818