@Article{li2005towards,
  author = {Li, L. and Alderson, D. and Doyle, J.C. and Willinger, W.},
  title  = {Towards a theory of scale-free graphs: Definition, properties, and implications},
  journal = {Internet Mathematics},
  year   = {2005},
  number = {4},
  url    = {http://scholar.google.de/scholar.bib?q=info:Xi5NYPJyMvMJ:scholar.google.com/&output=citation&hl=de&as_sdt=2000&ct=citation&cd=0},

  const  = {\ text}
}
@Inproceedings{1014146,
  author = {Wu, Andrew Y. and Garland, Michael and Han, Jiawei},
  title  = {Mining scale-free networks using geodesic clustering},

  year   = {2004},
  number = {},
  url    = {http://doi.acm.org/10.1145/1014052.1014146},

  const  = {\ text}
}