1
by Posesorski, Ezequiel L.
Published 2012
KIT Scientific Publishing

3
by Verbaal ,Wim
Published 2005
Academia Press

4
by Botting, Jack
Published 2015
Open Book Publishers

5
by Grant, Patrick
Published 2012
Athabasca University Press

6
by Gustaitienė, Asta
Published 2009
Vytautas Magnus University