@article{JMLR:v18:15-495,
  author  = {Fabian Pedregosa and Francis Bach and Alexandre Gramfort},
  title   = {On the Consistency of Ordinal Regression Methods},
  journal = {Journal of Machine Learning Research},
  year    = {2017},
  volume  = {18},
  number  = {55},
  pages   = {1--35},
  url     = {http://jmlr.org/papers/v18/15-495.html}
}