@Incollection{jaeschke2012challenges,
  author = {Jäschke, Robert and Hotho, Andreas and Mitzlaff, Folke and Stumme, Gerd},
  title  = {Challenges in Tag Recommendations for Collaborative Tagging Systems},

  year   = {2012},
  number = {},
  url    = {http://dx.doi.org/10.1007/978-3-642-25694-3_3},
  doi = {10.1007/978-3-642-25694-3_3},
  const  = {\ text}
}