الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::519588aa65b48b80c43c1f0bdf269a9bTesthttps://doi.org/10.1016/s1283-0771Test(21)45314-4
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::fe0bd383384e0028ea65acb0f7a095efTesthttps://doi.org/10.1016/s1283-0771Test(21)44993-5