الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c70f8ef761b7c1230042250428ef9fcaTesthttp://hdl.handle.net/2066/218583Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5eae2bc860c70442eda3dbfe5f0491dfTesthttps://hal.univ-angers.fr/hal-02616912Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::b21ed7cc6cff669b6b3d67ffd9cc70ddTest