الوصول الحر: https://doaj.org/article/e0dab56113c143a5883549d43f6cb31eTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50de1fb179e4809d0441bbd48a8437daTesthttps://hal.in2p3.fr/in2p3-00654867Test