Abdessamad Bellouch, Ahmed Boujnoui, Abdellah Zaaloul, and Abdelkrim Haqiq. “Three-Dimensional Markov Chain Model to Help Reduce the Spread of COVID-19 in IoT Environment”. International Journal of Computer Information Systems and Industrial Management Applications 13 (January 1, 2021): 11. Accessed April 30, 2026. https://cspub-ijcisim.org/index.php/ijcisim/article/view/490.