To cite package ‘sda’ in publications use:

Ahdesmaki M, Zuber V, Gibb S, Strimmer K (2025). sda: Shrinkage Discriminant Analysis and CAT Score Variable Selection. R package version 1.3.9, https://CRAN.R-project.org/package=sda.

Corresponding BibTeX entry:

  @Manual{,
    title = {sda: Shrinkage Discriminant Analysis and CAT Score
      Variable Selection},
    author = {Miika Ahdesmaki and Verena Zuber and Sebastian Gibb and
      Korbinian Strimmer},
    year = {2025},
    note = {R package version 1.3.9},
    url = {https://CRAN.R-project.org/package=sda},
  }