الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33418c296488af6c04b79a51a68f78feTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00751dae5b25697a8f8a7ea31ce05568Test