To cite package ‘invivoPKfit’ in publications use:

  Wambaugh J, Ring C, Padilla Mercado G, Cook C (2025). _invivoPKfit:
  Fits Toxicokinetic Models to In Vivo PK Data Sets_. R package version
  2.0.0, <https://CRAN.R-project.org/package=invivoPKfit>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {invivoPKfit: Fits Toxicokinetic Models to In Vivo PK Data Sets},
    author = {John Wambaugh and Caroline Ring and Gilberto {Padilla Mercado} and Chris Cook},
    year = {2025},
    note = {R package version 2.0.0},
    url = {https://CRAN.R-project.org/package=invivoPKfit},
  }