@article{JMLR:v11:wu10a,
  author  = {Qiang Wu and Justin Guinney and Mauro Maggioni and Sayan Mukherjee},
  title   = {Learning Gradients: Predictive Models that Infer Geometry and Statistical Dependence},
  journal = {Journal of Machine Learning Research},
  year    = {2010},
  volume  = {11},
  number  = {75},
  pages   = {2175-2198},
  url     = {http://jmlr.org/papers/v11/wu10a.html}
}