To cite package ‘widals’ in publications use:

Zes D (2025). widals: Weighting by Inverse Distance with Adaptive Least Squares. R package version 0.6.2, https://CRAN.R-project.org/package=widals.

Corresponding BibTeX entry:

  @Manual{,
    title = {widals: Weighting by Inverse Distance with Adaptive Least
      Squares},
    author = {Dave Zes},
    year = {2025},
    note = {R package version 0.6.2},
    url = {https://CRAN.R-project.org/package=widals},
  }