الإتاحة: https://doi.org/10.1016/j.exger.2013.12.012Testhttps://api.elsevier.com/content/article/PII:S0531556513003689?httpAccept=text/xmlTesthttps://api.elsevier.com/content/article/PII:S0531556513003689?httpAccept=text/plainTest
الإتاحة: https://doi.org/10.1177/1753425909105548Test