To cite package ‘Directional’ in publications use:

Tsagris M, Athineou G, Adam C, Yu Z (2026). Directional: A Collection of Functions for Directional Data Analysis. R package version 7.5, https://CRAN.R-project.org/package=Directional.

Corresponding BibTeX entry:

  @Manual{,
    title = {Directional: A Collection of Functions for Directional
      Data Analysis},
    author = {Michail Tsagris and Giorgos Athineou and Christos Adam
      and Zehao Yu},
    year = {2026},
    note = {R package version 7.5},
    url = {https://CRAN.R-project.org/package=Directional},
  }