1
by Büssing, Arndt
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute

2
by Liesem, Kerstin
Published 2018
Nomos Verlagsgesellschaft mbH & Co. KG

3
by Matiaske, Wenzel
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

4
Published 2018
Peter Lang International Academic Publishers

5
by Meyer, Lisa
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

6
by Altmeppen, Klaus-Dieter
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG