@inproceedings{santos2010ecir,
  author = {Rodrygo L. T. Santos and Jie Peng and Craig Macdonald and Iadh Ounis},
  title = {Explicit search result diversification through sub-queries},
  booktitle = {Proceedings of the 31st European Conference on Information Retrieval},
  address = {Milton Keynes, UK},
  year = {2010},
  pages = {87--99},
  publisher = {Springer},
}