@Misc{ghoshal2009random,
  author = {Ghoshal, Gourab and Zlatic, Vinko and Caldarelli, Guido and Newman, M. E. J.},
  title  = {Random hypergraphs and their applications},

  year   = {2009},
  number = {},
  url    = {http://arxiv.org/abs/0903.0419},

  const  = {\ text}
}
@Misc{zlati2009hypergraph,
  author = {Zlatic, Vinko and Ghoshal, Gourab and Caldarelli, Guido},
  title  = {Hypergraph topological quantities for tagged social networks},

  year   = {2009},
  number = {},
  url    = {http://arxiv.org/abs/0905.0976},

  const  = {\ text}
}
@Article{1751-8121-41-22-224016,
  author = {Capocci, Andrea and Caldarelli, Guido},
  title  = {Folksonomies and clustering in the collaborative system CiteULike},
  journal = {Journal of Physics A: Mathematical and Theoretical},
  year   = {2008},
  number = {22},
  url    = {http://stacks.iop.org/1751-8121/41/224016},

  const  = {\ text}
}
@Article{journals/corr/abs-physics-0602026,
  author = {Capocci, Andrea and Servedio, Vito Domenico Pietro and Colaiori, Francesca and Buriol, Luciana S. and Donato, Debora and Leonardi, Stefano and Caldarelli, Guido},
  title  = {Preferential attachment in the growth of social networks: the case of Wikipedia},
  journal = {CoRR},
  year   = {2006},
  number = {},
  url    = {http://dblp.uni-trier.de/db/journals/corr/corr0602.html#abs-physics-0602026},

  const  = {\ text}
}