21
by Reutter, Wolfgang Paul
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

22
by Friedrich, Alexander
Published 2018
Nomos Verlagsgesellschaft mbH & Co. KG

23
by Jäger, Uli
Published 2018
Nomos Verlagsgesellschaft mbH & Co. KG

24
by Dopheide, Christian
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

25
by Altmeppen, Klaus-Dieter
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

26
by Hauff, Michael von
Published 2018
Nomos Verlagsgesellschaft mbH & Co. KG

27
by Landman, Christina
Published 2016
AOSIS