الوصول الحر: https://escholarship.org/uc/item/2322b8mwTest
الوصول الحر: https://escholarship.org/uc/item/6540w3jjTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9f842c85afa58734cfde5fd17a7c5b7Testhttps://doi.org/10.1080/08916930600825867Test