<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">W3C = World Wide Web Consortium</hi> (2012): <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">SKOS</hi>. Simple Knowledge Organization System <ref xmlns="http://www.tei-c.org/ns/1.0" target="Simple Knowledge Organization System">Simple Knowledge Organization System</ref> [letzter Zugriff 12. Februar 2016].