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1
2
Published:
Bonn,
Inst. Finanzen und Steuern,
2004
3
Published:
Hamburg,
Kovač,
2011
4
Published:
Baden-Baden,
Nomos,
2012
5
Published:
Bonn,
Inst. Finanzen und Steuern,
2004
6
Published:
Bonn,
IFSt,
2003
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