@Inproceedings{koerner2010thinking,
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  year   = {2010},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/benz/papers/2010/koerner2010thinking.pdf},

  const  = {\ text}
}
@Inproceedings{schein2002methods,
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  title  = {Methods and Metrics for Cold-start Recommendations},

  year   = {2002},
  number = {},
  url    = {http://doi.acm.org/10.1145/564376.564421},
  doi = {10.1145/564376.564421},
  const  = {\ text}
}
@Article{benetka2006bolognaprozess,
  author = {Benetka, Gerhard and Przyborski, Aglaja},
  title  = {Der Bologna-Prozess als Chance für eine praxeologische Wende in der Psychologieausbildung},

  year   = {2006},
  number = {},
  url    = {http://www.sfu.ac.at/psychologie/download/pioe.pdf},

  const  = {\ text}
}