1
by Merz, Joachim
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

2
by Grunwald, Klaus
Published 2018
Nomos Verlagsgesellschaft mbH & Co. KG

3
by Becker, Manfred
Published 2019
Rainer Hampp Verlag

4
by Heßler, Martina
Published 2020
Nomos Verlagsgesellschaft mbH & Co. KG