الإتاحة: https://dspace.library.uu.nl/handle/1874/349446Test
الإتاحة: https://doi.org/10.1177/0271678X16654496Testhttps://hdl.handle.net/1887/114487Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ad6339be4383c1afbe3013d742caa94Testhttps://europepmc.org/articles/PMC5435289Test/