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  year   = {2013},
  number = {},
  url    = {},

  const  = {\ text}
}
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  year   = {2013},
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  const  = {\ text}
}
@Incollection{mitzlaff2013semantics,
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  year   = {2013},
  number = {},
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  const  = {\ text}
}
@Inproceedings{ageev2011modeling,
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}
@Article{atzmueller2011enhancing,
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  year   = {2011},
  number = {3},
  url    = {http://dx.doi.org/10.1524/itit.2011.0631},
  doi = {10.1524/itit.2011.0631},
  const  = {\ text}
}
@Book{haklay2010interacting,
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  year   = {2010},
  number = {},
  url    = {http://www.amazon.co.uk/gp/product/0470998245/},

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  year   = {2010},
  number = {20},
  url    = {http://www.uni-kassel.de/fb7/ibwl/leimeister/pub/JML_205.pdf},

  const  = {\ text}
}
@Inproceedings{ls_leimeister,
  author = {Riedl, C. and Wagner, S. and Leimeister, J. M. and Krcmar, H.},
  title  = {Exploring Large Collections of Ideas in Collaborative Settings through Visualization},

  year   = {2010},
  number = {20},
  url    = {http://pubs.wi-kassel.de/wp-content/uploads/2013/03/JML_196.pdf},

  const  = {\ text}
}
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  doi = {10.1007/s11257-008-9057-x},
  const  = {\ text}
}
@Incollection{20092009symbolism,
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  title  = {Symbolism and the Interaction of the Real and the Ideal: Scenery in Early-Modern Netherlandish Graphic Art},

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

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}
@Incollection{citeulike:3149792,
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  const  = {\ text}
}