الإتاحة: https://doi.org/10.1007/978-3-030-02200-6_6Testhttp://hdl.handle.net/11368/2966890Test
الإتاحة: https://doi.org/10.1002/pbc.24943Testhttp://hdl.handle.net/11368/2777323Test
الإتاحة: http://hdl.handle.net/11571/1141322Test
الإتاحة: http://hdl.handle.net/11571/281202Test
الإتاحة: https://doi.org/10.1007/s10072-011-0626-0Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::725a5d92aacb6c57802d0f8bdb8162bbTesthttp://hdl.handle.net/11368/2966890Test