خلوفي سفيان, and شريط كمال. “Towards Building and Activating an Early Warning System Forepidemic Risks to Confront the Expected Fourth Generation of the Corona Virus in Algeria- A Necessity After the Coronavirus, Covid-19 (suggested model): تاريخ الاستلام:26 10 2020 تاريخ القبول:18 02 2021”. Human Resources Development Research, vol. 16, no. 03, Nov. 2021, pp. 207-32, https://rdrh.univ-setif2.dz/index.php/rdrh/article/view/351.