To cite package ‘mfp2’ in publications use:

Kipruto E, Kammer M, Royston P, Sauerbrei W (2026). mfp2: Multivariable Fractional Polynomial Models with Extensions. R package version 1.0.2, https://github.com/edwinkipruto/mfp2.

Corresponding BibTeX entry:

  @Manual{,
    title = {mfp2: Multivariable Fractional Polynomial Models with
      Extensions},
    author = {Edwin Kipruto and Michael Kammer and Patrick Royston and
      Willi Sauerbrei},
    year = {2026},
    note = {R package version 1.0.2},
    url = {https://github.com/edwinkipruto/mfp2},
  }