17
by Muhs, Dieter, Wittel, Herbert, Becker, Manfred
Published 1994
Vieweg+Teubner Verlag

19
by Becker, Manfred
Published 2019
Rainer Hampp Verlag

20
by Becker, Manfred
Published 2012
Schäffer-Poeschel Verlag für Wirtschaft Steuern Recht GmbH