For his paper Die Wesensmerkmale der Staatsorganisation in rechtlicher und entwicklungsgeschichtlicher Sicht ( `` Characteristics of State Organization from a Juristic and Developmental-Historical Viewpoint '' ) , in 1964 he was awarded the title of professor , a title of academic distinction in Germany , and taught at the University of Munich until 1966 .
He wrote Die Wesensmerkmale der Staatsorganisation in rechtlicher und entwicklungsgeschichtlicher Sicht ( `` Characteristics of State Organization from a Juristic and Developmental-Historical Viewpoint '' ) , and was given the title of professor in 1964 .