To cite gumbel in publications use:

Dutang C (2026). gumbel: package for Gumbel copula. R package version 1.10-5, https://CRAN.R-project.org/package=gumbel.

Corresponding BibTeX entry:

  @Manual{,
    title = {gumbel: package for Gumbel copula},
    author = {Christophe Dutang},
    year = {2026},
    note = {R package version 1.10-5},
    url = {https://CRAN.R-project.org/package=gumbel},
  }