To cite package ‘rpsurv’ in publications use:

  El Badisy I (2026). _rpsurv: Fast Royston-Parmar Flexible Parametric
  Survival Models_. R package version 0.8.0,
  <https://github.com/ielbadisy/rpsurv>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rpsurv: Fast Royston-Parmar Flexible Parametric Survival Models},
    author = {Imad {El Badisy}},
    year = {2026},
    note = {R package version 0.8.0},
    url = {https://github.com/ielbadisy/rpsurv},
  }