@book{Burckhardt, author = {Burckhardt, C. J.}, title = {Geschichte zwischen Gestern und Morgen, M{\"u}nchen (List Verlag) 1974.}, language = {de} } @book{Burckhardt, author = {Burckhardt, C. J.}, title = {Zum Begriff der Macht, Z{\"u}rich (Arche Verlag) 1972.}, language = {de} }