الوصول الحر: https://doaj.org/article/2405364042e3410191aaa2afd15a5832Test
الوصول الحر: https://doaj.org/article/7ee319e775264fa693524def62e3122aTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c8192e2b866c61580569b62c740d9c2Testhttps://doi.org/10.1186/s13601-017-0142-2Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5af718ed8e1c445734fb58c36cdc5d21Test