@article{rabiner1986,
  title={An introduction to hidden Markov models},
  author={L. R. Rabiner and Biing‐Hwang Juang},
  year={1986},
  journal={IEEE ASSP Magazine},
  doi={10.1109/massp.1986.1165342},
  url={https://doi.org/10.1109/massp.1986.1165342}
}