Setiawan, F., A. Sadiyoko, and C. Setiardjo. “Application of Pigeon Inspired Optimization for Multidimensional Knapsack Problem”. International Journal of Industrial Engineering and Engineering Management 2, no. 1 (June 15, 2020): 45–56. Accessed September 1, 2024. https://ojs.uajy.ac.id/index.php/IJIEEM/article/view/3841.