Zidat, R., N. Amia, A. Tighlit, and K. Tighidet. “The Effect of Sanitary Restrictions on Businesses in the City of Bejaia: Factorial Analysis and Logistic Regression (ordered Multinomial Logit)”. International Journal of Economic Perspectives, vol. 18, no. 12, Dec. 2024, pp. 3113-32, http://www.ijeponline.org/index.php/journal/article/view/1104.