1
Krüger, Klaus.
De Gruyter,,
2021,
3
Düwel, Klaus.
De Gruyter,,
2020,
5
Welke, Klaus.
Walter de Gruyter,,
2019,
6
Kühlmann, Wilhelm
de Gruyter,,
2019,
7
Kühlmann, Wilhelm
de Gruyter,,
2019,
8
Bock, Klaus.
Walter de Gruyter,,
2018,
10
Köpcke, Klaus-Michael
De Gruyter,,
2017,