الوصول الحر: https://doaj.org/article/47eb970a82714e8bbe3e31bd84ffb174Test
الإتاحة: https://doi.org/10.1080/1331677X.2019.1636698Testhttps://doaj.org/article/a85d248264ef44628a5b6bf49bab42ebTest
الإتاحة: https://hrcak.srce.hr/228817Test