الوصول الحر: https://doaj.org/article/f46b7484809049e6bba51a5d126c45c2Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d64bf9a5fa74560edcde97db38a64187Testhttp://europepmc.org/articles/PMC7382099Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2db52893908612d2a28801cfbe54b468Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::658e5628ece72547562ae8712ae04100Test