@Inbook{greef2011relations,
  author = {Greef, Samuel and Kalass, Viktoria},
  title  = {Les relations sociales à la Deutsche Bahn: nouveaux acteurs et évolution des rapports de force sur fond de privatisation et de libéralisation},

  year   = {2011},
  number = {},
  url    = {},

  const  = {\ text}
}
@Inbook{schroeder2011nouveaux,
  author = {Schroeder, Wolfagang and Greef, Samuel},
  title  = {Nouveaux acteurs de la représentation des intérêts des salariés en Allemagne},

  year   = {2011},
  number = {},
  url    = {},

  const  = {\ text}
}
@Book{greef2011berufsgewerkschaften,
  author = {Schroeder, Wolfgang and Kalass, Viktoria and Greef, Samuel},
  title  = {Berufsgewerkschaften in der Offensive. Vom Wandel des deutschen Gewerkschaftsmodells},

  year   = {2011},
  number = {},
  url    = {},

  const  = {\ text}
}
@Article{greef2010anhang,
  author = {Greef, Samuel},
  title  = {Anhang: Geschichte - Organisation - Basisdaten},

  year   = {2010},
  number = {},
  url    = {},

  const  = {\ text}
}
@Article{greef2010erneuerungsdebatte,
  author = {Greef, Samuel and Schroeder, Wolfgang and Kalass, Viktoria},
  title  = {Gewerkschaftliche Erneuerungsdebatte},

  year   = {2010},
  number = {13--17},
  url    = {},

  const  = {\ text}
}
@Article{greef2010konkurrenz,
  author = {Greef, Samuel},
  title  = {Neue Konkurrenz in der Tarifpolitik - Der Marburger Bund},

  year   = {2010},
  number = {},
  url    = {},

  const  = {\ text}
}
@Book{greef2009berufsgewerkschaften,
  author = {Greef, Samuel},
  title  = {Berufsgewerkschaften. Kleine Arbeitnehmerverbände als Herausforderung für das deutsche Gewerkschaftsmodell},

  year   = {2009},
  number = {},
  url    = {},

  const  = {\ text}
}
@Article{greef2008linkspartei,
  author = {Greef, Samuel and Schroeder, Wolfgang and Reschke, Michael},
  title  = {Die Linkspartei in Hessen},

  year   = {2008},
  number = {},
  url    = {},

  const  = {\ text}
}
@Article{greef2008industrie,
  author = {Greef, Samuel and Schroeder, Wolfgang},
  title  = {Industrie- und Spartengewerkschaften im Konflikt. Organisatorische Voraussetzungen und realisierte Gelegenheitsstrukturen},
  journal = {Industrielle Beziehungen},
  year   = {2008},
  number = {4},
  url    = {},

  const  = {\ text}
}
@Book{greef2008kleinegewerkschaften,
  author = {Greef, Samuel and Schroeder, Wolfgang and Kalass, Viktoria},
  title  = {Kleine Gewerkschaften und Berufsverbände im Wandel},

  year   = {2008},
  number = {},
  url    = {},

  const  = {\ text}
}