To cite package ‘FRCI’ in publications use:

  Trigo Nasser Felix C, Garcia N, Sousa A (2025). _FRCI: Fuzzy &
  Randomized Confidence Intervals_. R package version 0.1.0,
  <https://CRAN.R-project.org/package=FRCI>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {FRCI: Fuzzy & Randomized Confidence Intervals},
    author = {Carlos Henrique {Trigo Nasser Felix} and Nancy Garcia and Alex Sousa},
    year = {2025},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=FRCI},
  }