الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e3e808ca09f8ea6b9f0121e4246c161Testhttps://repository.ubn.ru.nl/handle/2066/249463Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d72ae885b687d92c6a175d20b37d6eceTesthttps://hdl.handle.net/2066/251013Test