To cite package ‘armadillo4r’ in publications use:

  Vargas Sepulveda M, Sanderson C (2026). _armadillo4r: An 'Armadillo'
  Interface_. R package version 0.9.0,
  <https://github.com/pachadotdev/armadillo4r>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {armadillo4r: An 'Armadillo' Interface},
    author = {Mauricio {Vargas Sepulveda} and Conrad Sanderson},
    year = {2026},
    note = {R package version 0.9.0},
    url = {https://github.com/pachadotdev/armadillo4r},
  }