@article{JMLR:v6:cuturi05a,
  author  = {Marco Cuturi and Kenji Fukumizu and Jean-Philippe Vert},
  title   = {Semigroup Kernels on Measures},
  journal = {Journal of Machine Learning Research},
  year    = {2005},
  volume  = {6},
  number  = {40},
  pages   = {1169--1198},
  url     = {http://jmlr.org/papers/v6/cuturi05a.html}
}