الإتاحة: http://hdl.handle.net/11585/866752Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=od______1064::0bbdba93a3743bf8c2c6b8c8fa7d9e45Testhttp://ora.ox.ac.uk/objects/uuid:37cb49d3-1c2f-4ff6-aae9-ff8b94b137bcTest