@Inproceedings{jaeschke2009testing,
  author = {Jäschke, Robert and Eisterlehner, Folke and Hotho, Andreas and Stumme, Gerd},
  title  = {Testing and Evaluating Tag Recommenders in a Live System},

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

  const  = {\ text}
}
@Inproceedings{marinho:ecml2009,
  author = {Rendle, Steffen and Schmidt-Thieme, Lars},
  title  = {Factor Models for Tag Recommendation in BibSonomy},

  year   = {2009},
  number = {},
  url    = {http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-497/},

  const  = {\ text}
}