To cite simsalapar in publications use:

Marius Hofert, Martin Maechler (2016). Parallel and Other Simulations in R Made Easy: An End-to-End Study. Journal of Statistical Software, 69(4), 1-44.<doi:10.18637/jss.v069.i04>

Corresponding BibTeX entry:

  @Article{,
    title = {Parallel and Other Simulations in {R} Made Easy: An
      End-to-End Study},
    author = {Marius Hofert and Martin M\"achler},
    journal = {Journal of Statistical Software},
    year = {2016},
    volume = {69},
    number = {4},
    pages = {1--44},
    doi = {10.18637/jss.v069.i04},
  }