URL الوصول: https://doaj.org/article/fbad8b62acc24df2975e3fb340744314
URL الوصول: https://doaj.org/article/30767f2443254ea8bf2af9cd856187e3
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3369931d5b3ecbffb7ee5f6f71c63294https://europepmc.org/articles/PMC4781633/