To cite package ‘optiSel’ in publications use:

  Wellmann R (2026). _optiSel: Optimum Contribution Selection and
  Population Genetics_. R package version 2.1.0,
  <https://CRAN.R-project.org/package=optiSel>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {optiSel: Optimum Contribution Selection and Population Genetics},
    author = {Robin Wellmann},
    year = {2026},
    note = {R package version 2.1.0},
    url = {https://CRAN.R-project.org/package=optiSel},
  }