@InProceedings{barber06,
  author =	 {D. Barber and B. Mesot},
  title =	 {A Novel {G}aussian Sum Smoother for Approximate
                  Inference in Switching Linear Dynamical Systems},
  booktitle =	 {Advances in Neural Information Processing
                  Systems~(NIPS)},
  year =	 {2006},
  volume =	 {20},
}