To cite package ‘GGUM’ in publications use:

  Tendeiro J, Castro-Alvarez S (2023). _GGUM: Generalized Graded
  Unfolding Model_. R package version 0.5,
  <https://CRAN.R-project.org/package=GGUM>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {GGUM: Generalized Graded Unfolding Model},
    author = {Jorge N. Tendeiro and Sebastian Castro-Alvarez},
    year = {2023},
    note = {R package version 0.5},
    url = {https://CRAN.R-project.org/package=GGUM},
  }