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  const  = {\ text}
}
@Inproceedings{ls_leimeister,
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  year   = {2010},
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  const  = {\ text}
}
@Inproceedings{gemmell2009improving,
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}
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}
@Incollection{citeulike:6386729,
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@Inproceedings{parra2009evaluation,
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}
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  const  = {\ text}
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@Inproceedings{jaeschke07tagKdml,
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  const  = {\ text}
}
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  const  = {\ text}
}
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  const  = {\ text}
}
@Article{Herlocker:2004:ECF:963770.963772,
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  doi = {10.1145/963770.963772},
  const  = {\ text}
}
@Inproceedings{Whitby04filteringout,
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  year   = {2004},
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  url    = {},

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}
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  const  = {\ text}
}
@Inproceedings{sarwar2001itembased,
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  const  = {\ text}
}
@Inproceedings{sarwar2001item,
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  year   = {2001},
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  const  = {\ text}
}
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  year   = {2000},
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  const  = {\ text}
}
@Article{kautz1997referral,
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  const  = {\ text}
}