To cite package ‘BIOEFIC’ in publications use:

  Blezins de Arruda M (2026). _BIOEFIC: Relative Bioefficiency via
  Simultaneous Regressions_. R package version 0.1.1,
  <https://CRAN.R-project.org/package=BIOEFIC>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {BIOEFIC: Relative Bioefficiency via Simultaneous Regressions},
    author = {Michel {Blezins de Arruda}},
    year = {2026},
    note = {R package version 0.1.1},
    url = {https://CRAN.R-project.org/package=BIOEFIC},
  }