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Monopoly on the legitimate use of physical force

John Bew: "The Real Origins of Realpolitik", The National Interest, 2014

John Bew: "Real Realpolitik: A History", The John W. Kluge Center at the Library of Congress, April 10, 2014. Accessed July 29, 2014.

David Robertson: The Routledge Dictionary of Politics. Routledge 2004. ISBN 978-0-415-32377-2, p. 420 ()

Hajo Holborn: History of Modern Germany: 1840-1945. Princeton University Press 1982, ISBN 978-0-691-00797-7, p. 117 ()

Ruth Weissbourd Grant: Hypocrisy and integrity: Machiavelli, Rousseau, and the ethics of politics. University of Chicago Press 1997, ISBN 978-0-226-30582-0, p. 40-41 ()

Frank Whelon Wayman (ed.), Paul Francis Diehl (ed.): Reconstructing Realpolitik. University of Michigan Press 1994, ISBN 978-0-472-08268-1 ()

Federico Trocini: L’invenzione della «Realpolitik» e la scoperta della «legge del potere». August Ludwig von Rochau tra radicalismo e nazional-liberalismo, il Mulino, Bologna 2009