To cite package ‘levelSets’ in publications use:

  Raubertas R (2026). _levelSets: Ray-Based Mapping and Visualization
  of Level Sets (Excursion Sets)_. R package version 0.8.2,
  <https://CRAN.R-project.org/package=levelSets>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {levelSets: Ray-Based Mapping and Visualization of Level Sets (Excursion
Sets)},
    author = {Richard Raubertas},
    year = {2026},
    note = {R package version 0.8.2},
    url = {https://CRAN.R-project.org/package=levelSets},
  }