These institutions can grant habilitation and doctoral degrees and focus on research. These institutions are entitled to confer habilitation and doctoral degrees and focus on research. Examinations for PhD and Habilitation degrees are public. Therefore, a PhD degree is necessary for habilitation procedure. The Trnava University also rejected his habilitation thesis. His habilitation (which qualified him for a professorship) was on Bonaventure. In 1979 he qualified as a university lecturer with a habilitation thesis. The higher doctorate is similar in some respects to the habilitation in some European countries. This work became Haber's habilitation thesis. Thus the term "dysertacja" is reserved for PhD and Habilitation degrees. Habilitation in Biophysics and Medicine (1973, University Marburg). This time he was not interrupted, and Voigt offered to sponsor Born's habilitation thesis. The academic degree after the successful habilitation is e.g. Dr. rer.nat. After his habilitation there in 1928 he taught political theory and sociology. In 1905 he received the Habilitation in mathematics.