references.bib

@article{bebbington2007,
  title={Identifying volcanic regimes using hidden Markov models},
  author={Bebbington, Mark S},
  journal={Geophysical Journal International},
  volume={171},
  number={2},
  pages={921--942},
  year={2007},
  publisher={Blackwell Publishing Ltd Oxford, UK}
}


@article{bulla2006,
  title={Stylized facts of financial time series and hidden semi-Markov models},
  author={Bulla, Jan and Bulla, Ingo},
  journal={Computational statistics \& data analysis},
  volume={51},
  number={4},
  pages={2192--2209},
  year={2006},
  publisher={Elsevier}
}


@book{deboor1978,
  title={A practical guide to splines},
  author={De Boor, Carl and De Boor, Carl},
  volume={27},
  year={1978},
  publisher={springer-verlag New York}
}