@Article{10.1109/TKDE.2012.115,
  author = {Zubiaga, Arkaitz and Fresno, Victor and Martinez, Raquel and Garcia-Plaza, Alberto P.},
  title  = {Harnessing Folksonomies to Produce a Social Classification of Resources},
  journal = {IEEE Transactions on Knowledge and Data Engineering},
  year   = {2012},
  number = {PrePrints},
  url    = {},
  doi = {http://doi.ieeecomputersociety.org/10.1109/TKDE.2012.115},
  const  = {\ text}
}
@Misc{mejiasdeli,
  author = {Mejias, Ulises Ali},
  title  = {A del.icio.us study},

  year   = {2004},
  number = {},
  url    = {http://ideant.typepad.com/ideant/2004/12/a_delicious_stu.html},

  const  = {\ text}
}