طرفاية كمال; توات عثمان. The Impacts of the corona virus COVID-19 crisis on the tourism sector in Arab countries: تاريخ الاستلام:03/09/2020 تاريخ القبول:24/02/2021. Human Resources Development Research, [S. l.], v. 16, n. 03, p. 57–80, 2021. Disponível em: https://rdrh.univ-setif2.dz/index.php/rdrh/article/view/339. Acesso em: 3 nov. 2026.