الوصول الحر: https://lup.lub.lu.se/record/d7d72b18-2302-4931-9fbf-a4ea31923e43Testhttps://portal.research.lu.se/files/7485166/Thesis_web1026.pdfTest
الوصول الحر: http://www.osti.gov/scitech/servlets/purl/4586147Test
الوصول الحر: http://www.osti.gov/scitech/servlets/purl/4155650Test
الإتاحة: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7497Test
الإتاحة: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1080Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::11873b092d6c43ef5714fbc43ea0aaefTesthttp://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1080Test
الوصول الحر: http://www.osti.gov/scitech/biblio/4167694Test