@incollection {NIPS2003_AA59,
  author = " Noam Shental and  Aharon Bar-Hillel and  Tomer Hertz and  Daphna Weinshall",
  title = " Computing Gaussian Mixture Models with EM Using Equivalence Constraints",
  booktitle = "Advances in Neural Information Processing Systems 16",
  editor = "Sebastian Thrun and Lawrence Saul and Bernhard {Sch\"{o}lkopf}",
  publisher = "MIT Press",
  address = "Cambridge, MA",
  year = "2004",
  keywords = "clustering, EM algorithm, mixture of Gaussians, unsupervised learning, equivalence constraints",
  }