To cite package ‘annex’ in publications use:

  Stauffer R, Rojas-Kopeinig G, Grass T (2025). _annex: IEA EBC Annex86
  Data Analysis Package_. R package version 0.2-14,
  <https://github.com/iea-ebc-annex86/annex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {annex: IEA EBC Annex86 Data Analysis Package},
    author = {Reto Stauffer and Gabriel Rojas-Kopeinig and Tobias Grass},
    year = {2025},
    note = {R package version 0.2-14},
    url = {https://github.com/iea-ebc-annex86/annex},
  }