<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Beck, Kent et al.</hi> (2001): <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">Manifesto for agile software development</hi><ref xmlns="http://www.tei-c.org/ns/1.0" target="http://agilemanifesto.org">http://agilemanifesto.org</ref> [letzter Zugriff 20. Januar 2016].