To cite lcmm in publications use:

Proust-Lima C, Philipps V, Liquet B (2017). “Estimation of Extended Mixed Models Using Latent Classes and Latent Processes: The R Package lcmm.” Journal of Statistical Software, 78(2), 1–56. doi:10.18637/jss.v078.i02.

Proust-Lima C, Philipps V, Diakite A, Liquet B (2023). lcmm: Extended Mixed Models Using Latent Classes and Latent Processes. R package version: 2.1.0, https://cran.r-project.org/package=lcmm.

Corresponding BibTeX entries:

  @Article{,
    title = {Estimation of Extended Mixed Models Using Latent Classes
      and Latent Processes: The {R} Package {lcmm}},
    author = {C\'ecile Proust-Lima and Viviane Philipps and Benoit
      Liquet},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {78},
    number = {2},
    pages = {1--56},
    doi = {10.18637/jss.v078.i02},
  }

  @Manual{,
    title = {lcmm: Extended Mixed Models Using Latent Classes and
      Latent Processes},
    author = {Cecile Proust-Lima and Viviane Philipps and Amadou
      Diakite and Benoit Liquet},
    year = {2023},
    note = {R package version: 2.1.0},
    url = {https://cran.r-project.org/package=lcmm},
  }