@book{Menke2001,
  author    = {Menke, Christoph},
  title     = {Was ist politisches Handeln?},
  year      = {2001},
  language  = {de}
}
@book{Menke2001,
  author    = {Menke, Christoph},
  title     = {Die Permanenz der Revolution},
  isbn      = {3-608-94293-9},
  year      = {2001},
  language  = {de}
}