الوصول الحر: https://doaj.org/article/c7fe34a911a64fa59d0ca14fdb0574b6Test
الوصول الحر: https://doaj.org/article/36ca4362f9724220b7e342e0b8853e71Test
الإتاحة: https://doi.org/10.1177/2151459319847399Testhttps://doaj.org/article/b4dea12f3bbd49578ce85d5fd7554ac4Test