Cena, M. G., M. L. Crespo, C. Kavka, and M. G. Leguizamón. “The Ant Colony Metaphor for Multiple Knapsack Problem”. Journal of Computer Science and Technology, vol. 1, no. 02, Mar. 2000, p. 11 p., https://journal.info.unlp.edu.ar/JCST/article/view/1019.