To cite package ‘breathtestcore’ in publications use:

Menne D (2026). breathtestcore: Core Functions to Read and Fit 13c Time Series from Breath Tests. R package version 0.9.3, https://github.com/dmenne/breathtestcore.

Corresponding BibTeX entry:

  @Manual{,
    title = {breathtestcore: Core Functions to Read and Fit 13c Time
      Series from Breath Tests},
    author = {Dieter Menne},
    year = {2026},
    note = {R package version 0.9.3},
    url = {https://github.com/dmenne/breathtestcore},
  }