To cite mstate in publications use:

de Wreede LC, Fiocco M, Putter H (2011). “mstate: An R Package for the Analysis of Competing Risks and Multi-State Models.” Journal of Statistical Software, 38(7), 1–30. doi:10.18637/jss.v038.i07, https://www.jstatsoft.org/v38/i07/.

de Wreede LC, Fiocco M, Putter H (2010). “The mstate Package for Estimation and Prediction in Non- and Semi-Parametric Multi-State and Competing Risks Models.” Computer Methods and Programs in Biomedicine, 99, 261–274.

Putter H, Geskus RB, Fiocco M (2007). “Tutorial in Biostatistics: Competing Risks and Multi-State Models.” Statistics in Medicine, 2389–2430.

Corresponding BibTeX entries:

  @Article{,
    title = {{mstate}: An {R} Package for the Analysis of Competing
      Risks and Multi-State Models},
    author = {Liesbeth C. {de Wreede} and Marta Fiocco and Hein
      Putter},
    journal = {Journal of Statistical Software},
    year = {2011},
    volume = {38},
    number = {7},
    pages = {1--30},
    doi = {10.18637/jss.v038.i07},
    url = {https://www.jstatsoft.org/v38/i07/},
  }

  @Article{,
    title = {The {mstate} Package for Estimation and Prediction in Non-
      and Semi-Parametric Multi-State and Competing Risks Models},
    author = {Liesbeth C. {de Wreede} and Marta Fiocco and Hein
      Putter},
    journal = {Computer Methods and Programs in Biomedicine},
    year = {2010},
    volume = {99},
    pages = {261--274},
  }

  @Article{,
    title = {Tutorial in Biostatistics: Competing Risks and Multi-State
      Models},
    author = {Hein Putter and Ronald B. Geskus and Marta Fiocco},
    journal = {Statistics in Medicine},
    year = {2007},
    number = {26},
    pages = {2389--2430},
  }