الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::51ac8b64ce2ebf5441a09fc80233c3c7Testhttps://doi.org/10.1016/s0039-6028Test(01)01957-4
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f2ca1495454f83cfaa340a015685ae0Testhttps://hdl.handle.net/11858/00-001M-0000-0011-1A32-411858/00-001M-0000-0026-D03D-CTest