@article{li2012validating,
  abstract = {This paper investigates whether CiteULike and Mendeley are useful for measuring scholarly influence, using a sample of 1,613 papers published in Nature and Science in 2007. Traditional citation counts from the Web of Science (WoS) were used as benchmarks to compare with the number of users who bookmarked the articles in one of the two free online reference manager sites. Statistically significant correlations were found between the user counts and the corresponding WoS citation counts, suggesting that this type of influence is related in some way to traditional citation-based scholarly impact but the number of users of these systems seems to be still too small for them to challenge traditional citation indexes.},
  author = {Li, Xuemei and Thelwall, Mike and Giustini, Dean},
  doi = {10.1007/s11192-011-0580-x},
  interhash = {9f186a30dbe5af5dec8a49604bcca3dd},
  intrahash = {60c73c95336adf02c315c7b4c434cfd4},
  issn = {0138-9130},
  journal = {Scientometrics},
  language = {English},
  number = 2,
  pages = {461-471},
  publisher = {Springer Netherlands},
  title = {Validating online reference managers for scholarly impact measurement},
  url = {http://dx.doi.org/10.1007/s11192-011-0580-x},
  volume = 91,
  year = 2012
}

@article{1751-8121-41-22-224016,
  abstract = {We analyze CiteULike, an online collaborative tagging system where users bookmark and annotate scientific papers. Such a system can be naturally represented as a tri-partite graph whose nodes represent papers, users and tags connected by individual tag assignments. The semantics of tags is studied here, in order to uncover the hidden relationships between tags. We find that the clustering coefficient can be used to analyze the semantical patterns among tags.},
  author = {Capocci, Andrea and Caldarelli, Guido},
  interhash = {14c8ecbc38dcdae876c3f4401006e3bb},
  intrahash = {2a219a2664c566b405420f720583643a},
  journal = {Journal of Physics A: Mathematical and Theoretical},
  number = 22,
  pages = {224016 (7pp)},
  title = {Folksonomies and clustering in the collaborative system CiteULike},
  url = {http://stacks.iop.org/1751-8121/41/224016},
  volume = 41,
  year = 2008
}

@misc{santosneto07,
  author = {Santos-Neto, Elizeu and Ripeanu, Matei and Iamnitchi, Adriana},
  interhash = {a684fa9c2187ce048c69f6edb94f6c26},
  intrahash = {785df87d0942d1cb6da9b944df902730},
  title = {Tracking User Attention in Collaborative Tagging Communities},
  url = {http://arxiv.org/pdf/0705.1013},
  year = 2007
}