6
by Sadowski, Dieter
Published 1992
Duncker & Humblot GmbH

9
by Hoffeld, Wolfgang
Published 2013
Edition Rainer Hampp

11
by Hammen, Anke
Published 2011
Edition Rainer Hampp

12
by Schneider, Martin
Published 2020
Schäffer-Poeschel Verlag für Wirtschaft Steuern Recht GmbH