@article{JMLR:v17:14-511,
  author  = {Yuchen Zhang and Xi Chen and Dengyong Zhou and Michael I. Jordan},
  title   = {Spectral Methods Meet EM: A Provably Optimal Algorithm for Crowdsourcing},
  journal = {Journal of Machine Learning Research},
  year    = {2016},
  volume  = {17},
  number  = {102},
  pages   = {1--44},
  url     = {http://jmlr.org/papers/v17/14-511.html}
}