1
by Matiaske, Wenzel
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

2
by Rittmann, Günter
Published 2014
Nomos Verlagsgesellschaft mbH & Co. KG

3
by Ioannou, Konstantinos
Published 2020
MDPI - Multidisciplinary Digital Publishing Institute

4
by Lytras, Miltiadis
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute