الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50247a0a57e2d3211e284814b63cbea3Testhttps://doi.org/10.1080/09593331003770289Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99bb161b815651762265d3f9aac58f01Testhttps://pubmed.ncbi.nlm.nih.gov/20718293Test