Ahmad Afiq Iqmal Ahmad Saidi. “Comparison Between Exact Optimization and Heuristics Approaches for Maximizing Benefit of Point Redemption: A Knapsack Problem”. Applied Mathematics and Computational Intelligence (AMCI), vol. 10, Mar. 2023, pp. 78-86, https://ejournal.unimap.edu.my/index.php/amci/article/view/179.