الوصول الحر: https://doaj.org/article/b0302eb751114196bc93e20db9171c4cTest
الوصول الحر: https://doaj.org/article/35a75d67142b445e9a69f18063381a49Test
الوصول الحر: https://doaj.org/article/8691f779a5884daeaf5b771b7e2fd0afTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cc435943a9e4ec60d7ba2a6e920dbd0Testhttps://doaj.org/article/8691f779a5884daeaf5b771b7e2fd0afTest