الوصول الحر: https://doaj.org/article/56cf900502d140459292f6c91fed6cfdTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47cce6abdad48f02b2ec5636b91b35c6Testhttps://doi.org/10.1530/eje-19-0363Test
الإتاحة: http://hal.inria.fr/docs/00/69/98/19/PDF/TH2009_Menassa_Rita.pdfTest
الإتاحة: http://jcem.endojournals.org/content/84/11/4050.full.pdfTest
الوصول الحر: https://doaj.org/article/51687052133345d7baac8d1eaf09e8e0Test