Permission to Link: Making Available via Hyperlinks in the European Union after Svensson Burri Mira 340 periodical academic journal JIPITEC 5 3 2014 245 255 2190-3387 urn:nbn:de:0009-29-40985 http://nbn-resolving.de/urn:nbn:de:0009-29-40985 burri2014