الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::946cf9bab288e137126d44b6bb9cf2e0Testhttps://escholarship.org/uc/item/3049q3fvTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d549c543645426132dc30e20cd3bfefTesthttps://escholarship.org/uc/item/1jd1k01bTest