1
Published: Wiesbaden, VS Verlag für Sozialwissenschaften / GWV Fachverlage GmbH, Wiesbaden, 2009
   
2
Published: Bonn, VÖB, 2000
   
3
Published: Baden-Baden, Nomos-Verl.-Ges. [u.a.], 2006
   
4
Published: Baden-Baden, Nomos, 2019
   

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