To cite graphicalMCP in publications use:

  Xi D, Brockmann E (2024). _graphicalMCP: Graphical multiple
  comparison procedures_, version 0.2.6 edition.
  <https://CRAN.R-project.org/package=graphicalMCP>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{graphicalMCP}: Graphical multiple comparison procedures},
    author = {Dong Xi and Ethan Brockmann},
    edition = {version 0.2.6},
    year = {2024},
    url = {https://CRAN.R-project.org/package=graphicalMCP},
  }