Aljuwaiber, Abobakr, and Ahmed K. Elnagar. “Predicting Pilgrim and Visitor Satisfaction Through Using Smartphone Applications at Holy Sites During Covid-19”. Virtual Economics 5, no. 3 (November 12, 2022): 91–108. Accessed May 9, 2024. https://virtual-economics.eu/index.php/VE/article/view/200.