@inproceedings{DBLP:conf/sigmod/HaasK04,
  author    = {Peter J. Haas and
               Christian Koenig},
  title     = {A Bi-Level Bernoulli Scheme for Database Sampling},
  booktitle = {SIGMOD Conference},
  year      = {2004},
  pages     = {275-286},
  ee        = {http://doi.acm.org/10.1145/1007568.1007601},
  crossref  = {DBLP:conf/sigmod/2004},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/sigmod/2004,
  editor    = {Gerhard Weikum and
               Arnd Christian K{\"o}nig and
               Stefan De{\ss}loch},
  title     = {Proceedings of the ACM SIGMOD International Conference on
               Management of Data, Paris, France, June 13-18, 2004},
  booktitle = {SIGMOD Conference},
  publisher = {ACM},
  year      = {2004},
  isbn      = {1-58113-859-8},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}