الوصول الحر: https://explore.openaire.eu/search/publication?articleId=od______2091::2ab51107541823c0111a634c588dcb77Testhttps://opus4.kobv.de/opus4-fau/files/6507/junges_stability.pdfTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=od______3056::bb423615533cc57713a8be515e29e0d2Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=od______3056::deac8c74084b86a292e58d6a0f994f9cTest