الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbb3d1d32cf246940c91647e9d840220Testhttps://doi.org/10.1016/0003-9861Test(82)90504-5
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc496afd1eb90b5bb6fc506dc9d3968eTesthttps://doi.org/10.1016/0014-4827Test(84)90773-0
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5036a22588df243803779a6b2a5e944fTesthttps://pubmed.ncbi.nlm.nih.gov/7308488Test