@article{JMLR:v8:grauman07a,
  author  = {Kristen Grauman and Trevor Darrell},
  title   = {The Pyramid Match Kernel: Efficient Learning with Sets of Features},
  journal = {Journal of Machine Learning Research},
  year    = {2007},
  volume  = {8},
  number  = {26},
  pages   = {725--760},
  url     = {http://jmlr.org/papers/v8/grauman07a.html}
}