1
by Baldwin, Robert
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute

2
by Humeau-Heurtier, Anne
Published 2020
MDPI - Multidisciplinary Digital Publishing Institute

3
by Lytras, Miltiadis
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute

4
by Rittmann, Günter
Published 2014
Nomos Verlagsgesellschaft mbH & Co. KG