الوصول الحر: http://hdl.handle.net/10803/688204Test
الإتاحة: http://hdl.handle.net/10256.1/4946Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::7640aeb1b3a52506e2118396afad5a7cTesthttps://hdl.handle.net/2072/152099Test
الإتاحة: http://hdl.handle.net/10637/11041Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a54022f89e80fbbd7af8f0b175d7639bTest
الإتاحة: http://hdl.handle.net/2445/41696Testhttp://hdl.handle.net/10803/1754Testhttp://www.tdx.cat/TDX-0621106-115139Test