1
Published 1998
National Academy Press

2
Published 1995
National Academy Press

3
by Olson, Steve
Published 2011
National Academies Press

4
by Ouedraogo, Isidore
Published 2012
innsbruck university press

5
by Matiaske, Wenzel
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG

6
by Gabriele Giorgi
Published 2017
Frontiers Media SA

7
by Repnik, Friederike
Published 2018
Nomos Verlagsgesellschaft mbH & Co. KG

8
by Altmeppen, Klaus-Dieter
Published 2017
Nomos Verlagsgesellschaft mbH & Co. KG