On October 14, 1977 he presented his PhD dissertation "Die rumänische Koordinate der Lyrik Paul Celans" ("The Romanian Coordinate of Paul Celan's poetry").
Pe data de 14 octombrie, 1977 a susținut teza de doctorat - "Die rumänische Koordinate der Lyrik Paul Celans" ("Coordonata românească a poeziei lui Paul Celan").