@Inproceedings{ls_leimeister,
  author = {Köbler, F. and Riedl, C. and Vetter, C. and Leimeister, J. M. and Krcmar, H.},
  title  = {Social Connectedness on Facebook - An explorative study on status message usage},

  year   = {2010},
  number = {16},
  url    = {http://www.uni-kassel.de/fb7/ibwl/leimeister/pub/JML_202.pdf},

  const  = {\ text}
}
@Inproceedings{mitzlaff2010visit,
  author = {Mitzlaff, Folke and Benz, Dominik and Stumme, Gerd and Hotho, Andreas},
  title  = {Visit me, click me, be my friend: An analysis of evidence networks of user relationships in Bibsonomy},

  year   = {2010},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/pub/pdf/mitzlaff2010visit.pdf},

  const  = {\ text}
}