To cite clusteredMSM in publications, please cite the methodological
papers:

  Bakoyannis, G. (2021). Nonparametric analysis of nonhomogeneous
  multistate processes with clustered observations. Biometrics, 77(2),
  533-546. doi:10.1111/biom.13327

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Nonparametric analysis of nonhomogeneous multistate processes with clustered observations},
    author = {Giorgos Bakoyannis},
    journal = {Biometrics},
    year = {2021},
    volume = {77},
    number = {2},
    pages = {533-546},
    doi = {10.1111/biom.13327},
  }

  Bakoyannis, G., & Bandyopadhyay, D. (2022). Nonparametric tests for
  multistate processes with clustered data. Annals of the Institute of
  Statistical Mathematics, 74(5), 837-867.
  doi:10.1007/s10463-021-00819-x

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Nonparametric tests for multistate processes with clustered data},
    author = {Giorgos Bakoyannis and Dipankar Bandyopadhyay},
    journal = {Annals of the Institute of Statistical Mathematics},
    year = {2022},
    volume = {74},
    number = {5},
    pages = {837-867},
    doi = {10.1007/s10463-021-00819-x},
  }