M. Prabha, S. Radha, P. M. Priya, and B. S. Dhivya, “Sudoku Solver Using Minigrid Based Backtracking Algorithm”, IJRESM, vol. 5, no. 6, pp. 138–140, Jun. 2022, Accessed: Nov. 21, 2024. [Online]. Available: https://journal.ijresm.com/index.php/ijresm/article/view/2180