@article{JMLR:v20:18-349,
  author  = {Javier S{{\'a}}nchez-Monedero and Pedro A. Guti{{\'e}}rrez and Mar{{\'i}}a P{{\'e}}rez-Ortiz},
  title   = {ORCA: A Matlab/Octave Toolbox for Ordinal Regression},
  journal = {Journal of Machine Learning Research},
  year    = {2019},
  volume  = {20},
  number  = {125},
  pages   = {1--5},
  url     = {http://jmlr.org/papers/v20/18-349.html}
}