الوصول الحر: https://doaj.org/article/77ae0ffea96b47818c1369909741967cTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f13308da2dff022c5fc391bde6fa0a96Testhttps://pubmed.ncbi.nlm.nih.gov/32216823Test