A. Salem, Dina, and Esraa M. Hashim. “Impact of Data Pre-Processing on Covid-19 Diagnosis Using Machine Learning Algorithms”. International Journal of Intelligent Systems and Applications in Engineering 11, no. 1s (January 16, 2023): 164–171. Accessed May 18, 2024. https://www.ijisae.org/index.php/IJISAE/article/view/2489.