الوصول الحر: https://doaj.org/article/61f23777607e43bc81bdc25400b20a1aTest
الوصول الحر: https://doaj.org/article/cd8c4c8850944b68b5f6b34f83a8c925Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::70690767c4c50afa9adfdb4285122fa7Testhttps://doi.org/10.2139/ssrn.4435320Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9ee87048b0565a401aae693181e953aTesthttps://doi.org/10.3892/ijo.2019.4830Test