@article{JMLR:v13:raykar12a,
  author  = {Vikas C. Raykar and Shipeng Yu},
  title   = {Eliminating Spammers and Ranking Annotators for Crowdsourced Labeling Tasks},
  journal = {Journal of Machine Learning Research},
  year    = {2012},
  volume  = {13},
  number  = {16},
  pages   = {491--518},
  url     = {http://jmlr.org/papers/v13/raykar12a.html}
}