@article{JMLR:v10:weinberger09a,
  author  = {Kilian Q. Weinberger and Lawrence K. Saul},
  title   = {Distance Metric Learning for Large Margin Nearest Neighbor Classification},
  journal = {Journal of Machine Learning Research},
  year    = {2009},
  volume  = {10},
  number  = {9},
  pages   = {207--244},
  url     = {http://jmlr.org/papers/v10/weinberger09a.html}
}