الوصول الحر: https://doaj.org/article/75279cd7ad9f46f593bed20c4b72bd92Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8ea7dc04ce65e99e1f8cb116d222e1eTesthttp://hdl.handle.net/10138/356000Test