@Article{golder2006usage,
  author = {Golder, Scott A. and Huberman, Bernardo A.},
  title  = {Usage patterns of collaborative tagging systems},
  journal = {Journal of Information Science},
  year   = {2006},
  number = {2},
  url    = {http://jis.sagepub.com/content/32/2/198.abstract},
  doi = {10.1177/0165551506062337},
  const  = {\ text}
}