To cite package ‘FSM’ in publications use:

Chattopadhyay A, Morris C, Zubizarreta J (2021). FSM: Finite Selection Model. R package version 1.0.0, https://CRAN.R-project.org/package=FSM.

Corresponding BibTeX entry:

  @Manual{,
    title = {FSM: Finite Selection Model},
    author = {Ambarish Chattopadhyay and Carl Morris and Jose
      Zubizarreta},
    year = {2021},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=FSM},
  }