الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1507b810eec4c702aa130ac1a90c6b68Testhttps://doi.org/10.1155/2021/6697063Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73f9bbe0c6da8015aca18c5dc193d29dTesthttps://doaj.org/article/9e7cfdae2d224f7c9e1485ab696b9a41Test