Wolf H (2019). aplpack: Another Plot Package (version 190512). https://cran.r-project.org/package=aplpack.

Corresponding BibTeX entry:

  @Manual{,
    title = {{aplpack}: Another Plot Package (version 190512)},
    author = {Hans Peter Wolf},
    year = {2019},
    url = {https://cran.r-project.org/package=aplpack},
  }