Tschernobyl-EffektKarl-Dieter Opp, Petra Hartmann und Martin Stolle Unter Mitarb. von Christiane Gern, Wolfgang Roehl · First published 2013Open the Tome
Origins of a spontaneous revolutionKarl-Dieter Opp, Christiane Gern, Peter Voss · First published 1995Open the Tome
