Dr. ABDERRAHMANE Djoher , Pr. Ait Habouche-Mihoub Ouahiba. “The Impact of Covid19 on Pharmaceutical Companies in Algeria”. Pegem Journal of Education and Instruction, vol. 15, no. 4, Aug. 2025, pp. 5167-84, https://www.pegegog.net/index.php/pegegog/article/view/5012.