To cite package ‘BioIndex’ in publications use:

  Zupa W, Spedicato M (2026). _BioIndex: Biological Indicators and
  Indices for MEDITS Survey Data_. R package version 0.6.4,
  <https://CRAN.R-project.org/package=BioIndex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {BioIndex: Biological Indicators and Indices for MEDITS Survey Data},
    author = {Walter Zupa and Maria Teresa Spedicato},
    year = {2026},
    note = {R package version 0.6.4},
    url = {https://CRAN.R-project.org/package=BioIndex},
  }