@inproceedings{santos2011sigir-b,
  author = {Rodrygo L. T. Santos and Craig Macdonald and Iadh Ounis},
  title = {How diverse are {W}eb search results?},
  booktitle = {Proceedings of the 34th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval},
  year = {2011},
  pages = {},
  address = {Beijing, China},
  publisher = {ACM},
}