@article{JMLR:v7:lippert06a,
  author  = {Ross A. Lippert and Ryan M. Rifkin},
  title   = {Infinite-σ Limits For Tikhonov Regularization},
  journal = {Journal of Machine Learning Research},
  year    = {2006},
  volume  = {7},
  number  = {30},
  pages   = {855--876},
  url     = {http://jmlr.org/papers/v7/lippert06a.html}
}