Hadrya, F., F. El Hattimy, H. Hami, A. Mokhtari, and A. Soulaymani. “Covid-19 Pandemic Situation In The Arab World Till June 11, 2020: Spatial Panorama Obtained Following The Response Plan Implemented”. European Scientific Journal, ESJ, Vol. 17, no. 3, Jan. 2021, p. 176, doi:10.19044/esj.2021.v17n3p176.