الوصول الحر: https://doaj.org/article/a2eeacd93e4d4b208f4e18b6abf38d14Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cf3594260b6b2edcef1496d2691cdbfTesthttps://doaj.org/article/6b55fd60d5a7457b90bc56bf4fbc219bTest