To cite package ‘gdm’ in publications use:

  Fitzpatrick M, Mokany K, Manion G, Nieto-Lugilde D, Ferrier S (2025).
  _gdm: Generalized Dissimilarity Modeling_. R package version 1.6.0-5,
  <https://CRAN.R-project.org/package=gdm>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {gdm: Generalized Dissimilarity Modeling},
    author = {Matt Fitzpatrick and Karel Mokany and Glenn Manion and Diego Nieto-Lugilde and Simon Ferrier},
    year = {2025},
    note = {R package version 1.6.0-5},
    url = {https://CRAN.R-project.org/package=gdm},
  }