الوصول الحر: https://doaj.org/article/ca644294a7ea42e3a40c069921e9e37bTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19056f5a9575f59a447d43a23f626efaTesthttps://www.shs-conferences.org/articles/shsconf/pdf/2021/35/shsconf_icmesh2020_05003.pdfTest