To cite package ‘nivm’ in publications use:

  Fay MP (2025). _nivm: Noninferiority Tests with Variable Margins_. R
  package version 0.6, <https://CRAN.R-project.org/package=nivm>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {nivm: Noninferiority Tests with Variable Margins},
    author = {Michael P. Fay},
    year = {2025},
    note = {R package version 0.6},
    url = {https://CRAN.R-project.org/package=nivm},
  }