To cite DirStats in publications use:

Garc\'ia-Portugu├ęs E (2021). DirStats: Nonparametric Methods for Directional Data. R package version 0.1.7, https://CRAN.R-project.org/package=DirStats.

Corresponding BibTeX entry:

  @Manual{,
    title = {{DirStats}: Nonparametric Methods for Directional Data},
    author = {Eduardo Garc\'ia-Portugu\'es},
    year = {2021},
    note = {R package version 0.1.7},
    url = {https://CRAN.R-project.org/package=DirStats},
  }