الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4be8179f68427c0b7ef0875610f317e3Testhttps://doi.org/10.1016/s0008-6363Test(97)00088-6
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd1511666f4671f7e5c31400d5174699Testhttps://pubmed.ncbi.nlm.nih.gov/12829176Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=pmid________::e66c10ffbab5f3abbc1caa9017b51a6eTesthttps://pubmed.ncbi.nlm.nih.gov/8881516Test