@inproceedings{DBLP:conf/kdd/FaymonvilleWMB09,
  author    = {Peter Faymonville and
               Kai Wang and
               John Miller and
               Serge J. Belongie},
  title     = {CAPTCHA-based image labeling on the Soylent Grid},
  booktitle = {KDD Workshop on Human Computation},
  year      = {2009},
  pages     = {46-49},
  ee        = {http://doi.acm.org/10.1145/1600150.1600167},
  crossref  = {DBLP:conf/kdd/2009hcomp},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/kdd/2009hcomp,
  editor    = {Paul N. Bennett and
               Raman Chandrasekar and
               Max Chickering and
               Panagiotis G. Ipeirotis and
               Edith Law and
               Anton Mityagin and
               Foster J. Provost and
               Luis von Ahn},
  title     = {Proceedings of the ACM SIGKDD Workshop on Human Computation,
               Paris, France, June 28, 2009},
  booktitle = {KDD Workshop on Human Computation},
  publisher = {ACM},
  year      = {2009},
  isbn      = {978-1-60558-672-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}