@incollection{yeung2009multiple,
  title = "Multiple interests of users in collaborative tagging systems",
  author = "Yeung, Ching-man Au and Gibbins, Nicholas and Shadbolt, Nigel",
  year = "2009",
  booktitle = "Weaving Services and People on the World Wide Web",
  pages = "255--274",
  publisher = "Springer, Berlin, Heidelberg",
}