@article{Kopke2009,
  author    = {Kopke, Christoph},
  title     = {Perz, B., Die KZ-Gedenkst{\"a}tte Mauthausen 1945 bis zur Gegenwart; Innsbruck [u.a.], 2006},
  issn      = {0044-2828},
  year      = {2009},
  language  = {de}
}
@article{Kopke2009,
  author    = {Kopke, Christoph},
  title     = {Backes, U., Steglich, H. (Hrsg.), Die NPD; Baden-Baden, Nomos, 2007},
  issn      = {0032-3470},
  doi       = {10.1007/s11615-009-0131-8},
  year      = {2009},
  language  = {de}
}