الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2caacc602ec25d6e976ab27de2c5c57Testhttps://doi.org/10.1016/0014-4827Test(85)90148-x
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___::a2900ed63a7bd6c0117e4728b666452fTesthttps://pubmed.ncbi.nlm.nih.gov/4091820Test