الوصول الحر: https://doaj.org/article/5453658d93e54f48aed014091f46b2feTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::345c38d49c396ede55207621428ff8cdTesthttps://doaj.org/article/5453658d93e54f48aed014091f46b2feTest