To cite survsim in publications use:

Moriña D, Navarro A (2014). “The R Package survsim for the Simulation of Simple and Complex Survival Data.” Journal of Statistical Software, 59(2), 1–20. doi: 10.18637/jss.v059.i02.

Moriña D, Navarro A (2017). “Competing risks simulation with the survsim R package.” Communications in Statistics - Simulation and Computation, 46(7), 5712–5722. doi: 10.1080/03610918.2016.1175621.

Corresponding BibTeX entries:

  @Article{,
    title = {The {R} Package {survsim} for the Simulation of Simple and
      Complex Survival Data},
    author = {David Mori{\~n}a and Albert Navarro},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {59},
    number = {2},
    pages = {1--20},
    doi = {10.18637/jss.v059.i02},
  }

  @Article{,
    title = {Competing risks simulation with the {survsim} {R}
      package},
    author = {David Mori{\~n}a and Albert Navarro},
    journal = {Communications in Statistics - Simulation and
      Computation},
    year = {2017},
    volume = {46},
    number = {7},
    pages = {5712--5722},
    doi = {10.1080/03610918.2016.1175621},
  }