الإتاحة: https://doi.org/10.1080/15548627.2015.1100356Testhttp://hdl.handle.net/11586/241629Test
الإتاحة: https://doi.org/10.1080/15548627.2016.1147886Testhttp://hdl.handle.net/11586/241630Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::c000ae0986e07c34230251f4d356ed9aTesthttp://hdl.handle.net/11390/1141397Test