To cite package ‘functionals’ in publications use:

  EL BADISY I (2026). _functionals: Functional Programming with
  Parallelism and Progress Tracking_. R package version 0.5.1,
  <https://github.com/ielbadisy/functionals>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {functionals: Functional Programming with Parallelism and Progress Tracking},
    author = {Imad {EL BADISY}},
    year = {2026},
    note = {R package version 0.5.1},
    url = {https://github.com/ielbadisy/functionals},
  }