P. D. Veysel Aslanta?, Farah Hatem Khorsheed, and Bashar Ahmed. 2020. “Wrapper Feature Selection Approach Based on Binary Firefly Algorithm for Spam E-Mail Filtering”. Journal of Soft Computing and Data Mining 1 (2): 44-52. https://journal.uthm.edu.my/index.php/jscdm/article/view/7295.