1
by Extinction Rebellion Hannover
Published 2019
transcript Verlag

2
by Masala, Carlo
Published 2018
Nomos Verlagsgesellschaft mbH & Co. KG

3
by Blasius, Dirk
Published 2005
Vandenhoeck & Ruprecht

4
by Timmer, Karsten
Published 2000
Vandenhoeck & Ruprecht