(EN) Exhibition: Famous Alumni of the University of Heidelberg, su uni-heidelberg.de, Universität Heidelberg, 29 marzo 2001. URL consultato il 19 giugno 2017 (archiviato dall'url originale il 15 dicembre 2011).
«Helmut Kohl, for example, did his doctorate in Heidelberg in 1958, the title of his thesis being "The Political Development of the Palatinate and the Revival of the Political Parties after 1945"»