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http://www.agilemanifesto.org
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http://agilemanifesto.org/principles.html
3. Beck, D.E., Cowan, C.: Spiral Dynamics: Mastering Values. Leadership and Change. Wiley-Blackwell, Hoboken (2005). ISBN 978-1-4051-3356-2
4. Anderson, C.: Essential KANBAN condensed.
http://leankanban.com/guide/
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