@Inproceedings{giatsidis2011evaluating,
  author = {Giatsidis, Christos and Thilikos, Dimitrios M. and Vazirgiannis, Michalis},
  title  = {Evaluating Cooperation in Communities with the k-Core Structure},

  year   = {2011},
  number = {},
  url    = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5992567&tag=1},
  doi = {10.1109/ASONAM.2011.65},
  const  = {\ text}
}