To cite hhsmm in publications use:

Amini, M., Bayat, A. & Salehian, R. hhsmm: an R package for hidden hybrid Markov/semi-Markov models. Comput Stat (2022). https://doi.org/10.1007/s00180-022-01248-x

Corresponding BibTeX entry:

  @Article{,
    title = {hhsmm: an R package for hidden hybrid Markov/semi-Markov
      models},
    author = {Morteza Amini and Afarin Bayat & Reza Salehian},
    journal = {Computational Statistics},
    year = {2022},
    volume = {1},
    number = {1},
    pages = {1-53},
    url =
      {https://link.springer.com/article/10.1007/s00180-022-01248-x},
  }