@article{JMLR:v16:vapnik15b,
  author  = {Vladimir Vapnik and Rauf Izmailov},
  title   = {Learning Using Privileged Information: Similarity Control and Knowledge Transfer},
  journal = {Journal of Machine Learning Research},
  year    = {2015},
  volume  = {16},
  number  = {61},
  pages   = {2023--2049},
  url     = {http://jmlr.org/papers/v16/vapnik15b.html}
}