@inproceedings{FaridaniBuscher13_CrowdGroundTruth,
 author = {Siamak Faridani and Georg Buscher and Ya Xu},
  title = {A Ground Truth Inference Model for Ordinal Crowd-Sourced Labels Using Hard Assignment Expectation Maximization},
  booktitle = {HCOMP 2013: Human Computation and Crowdsourcing},
  year = {2013},
  pages = {20-21},
  address = {Palo Alto, CA, USA},
  publisher = {AAAI Press}
}