@article{JMLR:v9:christmann08a,
  author  = {Andreas Christmann and Arnout Van Messem},
  title   = {Bouligand Derivatives and Robustness of Support Vector Machines for Regression},
  journal = {Journal of Machine Learning Research},
  year    = {2008},
  volume  = {9},
  number  = {30},
  pages   = {915--936},
  url     = {http://jmlr.org/papers/v9/christmann08a.html}
}