To cite package ‘fRegression’ in publications use:

  Wuertz D, Setz T, Chalabi Y (2022). _fRegression: Rmetrics -
  Regression Based Decision and Prediction_. R package version
  4021.83.9000, <https://r-forge.r-project.org/projects/rmetrics>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fRegression: Rmetrics - Regression Based Decision and Prediction},
    author = {Diethelm Wuertz and Tobias Setz and Yohan Chalabi},
    year = {2022},
    note = {R package version 4021.83.9000},
    url = {https://r-forge.r-project.org/projects/rmetrics},
  }