@article{JMLR:v10:gunawardana09a,
  author  = {Asela Gunawardana and Guy Shani},
  title   = {A Survey of Accuracy Evaluation Metrics of Recommendation Tasks},
  journal = {Journal of Machine Learning Research},
  year    = {2009},
  volume  = {10},
  number  = {100},
  pages   = {2935--2962},
  url     = {http://jmlr.org/papers/v10/gunawardana09a.html}
}