Lang M (2017). “checkmate: Fast Argument Checks for Defensive R Programming.” The R Journal, 9(1), pp. 437–445. https://journal.r-project.org/archive/2017/RJ-2017-028/index.html.

Corresponding BibTeX entry:

  @Article{checkmate,
    title = {{checkmate}: Fast Argument Checks for Defensive R
      Programming},
    author = {Michel Lang},
    journal = {The R Journal},
    year = {2017},
    url =
      {https://journal.r-project.org/archive/2017/RJ-2017-028/index.html},
    pages = {437--445},
    volume = {9},
    number = {1},
  }