To cite frailtypack in publications use:

  Virginie Rondeau, Yassin Mazroui, Juan R. Gonzalez (2012).
  frailtypack: An R Package for the Analysis of Correlated Survival
  Data with Frailty Models Using Penalized Likelihood Estimation or
  Parametrical Estimation. Journal of Statistical Software, 47(4),
  1-28. URL https://www.jstatsoft.org/v47/i04/

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{frailtypack}: An {{R}} Package for the Analysis of Correlated Survival Data with Frailty Models Using Penalized Likelihood Estimation or Parametrical Estimation},
    author = {Virginie Rondeau and Yassin Mazroui and Juan {R. Gonzalez}},
    journal = {Journal of Statistical Software},
    year = {2012},
    volume = {47},
    number = {4},
    pages = {1-28},
    url = {https://www.jstatsoft.org/v47/i04/},
  }

  Virginie Rondeau, Juan R. Gonzalez (2005). {Frailtypack}: A computer
  program for the analysis of correlated failure time data using
  penalized likelihood estimation Computer Methods and Programs in
  Biomedicine, 80(2), 154-164.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Frailtypack: A computer program for the analysis of correlated failure time data using penalized likelihood estimation},
    author = {Virginie Rondeau and Juan {R. Gonzalez}},
    journal = {Computer Methods and Programs in Biomedicine},
    year = {2005},
    volume = {80},
    number = {2},
    pages = {154-164},
  }

To cite frailtypack in publications use:

  Król A, Mauguen A, Mazroui Y, Laurent A, Michiels S, Rondeau V
  (2017). “Tutorial in Joint Modeling and Prediction: A Statistical
  Software for Correlated Longitudinal Outcomes, Recurrent Events and a
  Terminal Event.” _Journal of Statistical Software_, *81*(3), 1-52.
  doi:10.18637/jss.v081.i03 <https://doi.org/10.18637/jss.v081.i03>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Tutorial in Joint Modeling and Prediction: A Statistical Software for Correlated Longitudinal Outcomes, Recurrent Events and a Terminal Event},
    author = {Agnieszka Kr\'{o}l and Audrey Mauguen and Yassin Mazroui and Alexandre Laurent and Stefan Michiels and Virginie Rondeau},
    journal = {Journal of Statistical Software},
    year = {2017},
    volume = {81},
    number = {3},
    pages = {1--52},
    doi = {10.18637/jss.v081.i03},
  }

To cite frailtypack in publications use:

  Rondeau V, Gonzalez J, Mazroui Y, Mauguen A, Diakite A, Laurent A,
  Lopez M, Król A, Sofeu C (2019). _frailtypack: General Frailty
  Models: Shared, Joint and Nested Frailty Models with Prediction;
  Evaluation of Failure-Time Surrogate Endpoints_. R package version
  3.0.3, <https://CRAN.R-project.org/package=frailtypack>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{frailtypack}: General Frailty Models: Shared, Joint and Nested Frailty Models with Prediction; Evaluation of Failure-Time Surrogate Endpoints},
    author = {Virginie Rondeau and Juan R. Gonzalez and Yassin Mazroui and Audrey Mauguen and Amadou Diakite and Alexandre Laurent and Myriam Lopez and Agnieszka Kr\'{o}l and Casimir L. Sofeu},
    year = {2019},
    note = {{R} package version 3.0.3},
    url = {https://CRAN.R-project.org/package=frailtypack},
  }
