To cite package ‘gdxtools’ in publications use:

  Drouet L (2026). _gdxtools: Manipulate 'GDX' Files_. R package
  version 1.1.1, <https://github.com/lolow/gdxtools>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gdxtools: Manipulate 'GDX' Files},
    author = {Laurent Drouet},
    year = {2026},
    note = {R package version 1.1.1},
    url = {https://github.com/lolow/gdxtools},
  }