@article{JMLR:v8:li07a,
  author  = {Jia Li and Surajit Ray and Bruce G. Lindsay},
  title   = {A Nonparametric Statistical Approach to Clustering via Mode Identification},
  journal = {Journal of Machine Learning Research},
  year    = {2007},
  volume  = {8},
  number  = {59},
  pages   = {1687--1723},
  url     = {http://jmlr.org/papers/v8/li07a.html}
}