1
by Teich, Mikuláš
Published 2015
Open Book Publishers

2
by Oberprieler, Rolf
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute

3
by Oberprieler, Rolf
Published 2019
MDPI - Multidisciplinary Digital Publishing Institute

4
by Kataryna Wolczuk
Published 2001
Central European University Press