Jean-Paul (2014). Sigmaringen. Tempus (in French). Paris: Perrin. ISBN 978-2-262-03300-2. Jäckel, Eberhard (1968) [1st pub. 1966: Deutsche Verlag-Anstalg GmbH...
Jean-Paul (2014). Sigmaringen. Tempus (in French). Paris: Perrin. ISBN 978-2-262-03300-2. Eric Conan et Henry Rousso. Vichy, un passé qui ne passe pas, Fayard...
Jean-Paul (2014). Sigmaringen. Tempus (in French). Paris: Perrin. ISBN 978-2-262-03300-2. Conan, Eric; Rousso, Henry (1998). Vichy: An Ever-Present Past. Sudbury...