Mohamed, Abdulmajid H., Ilham Ben-salem, and Hanan Ettaher Dagez. “A Constructive System Forgetting As Part of Case-Based Reasoning”. International Journal of Engineering and Computer Science 7, no. 01 (January 24, 2018): 23399-23504. Accessed August 25, 2019. http://ijecs.in/index.php/ijecs/article/view/3944.