@article{Butler:2008:Nature:18172465,
  author = {Butler, D},
  doi = {10.1038/451006a},
  interhash = {d4652ec77b4ae09062fac4676cea6bb7},
  intrahash = {d930c99c8e9c7fdf8ded3e9edb0762b0},
  journal = {Nature},
  month = Jan,
  number = 7174,
  pages = {6-6},
  pmid = {18172465},
  title = {Free journal-ranking tool enters citation market},
  url = {http://www.nature.com/news/2008/080102/full/451006a.html},
  volume = 451,
  year = 2008
}