To cite package ‘fastei’ in publications use:

  Thraves C, Ubilla P, Hermosilla D (2026). _fastei: Methods for ''A
  Fast Alternative for the R x C Ecological Inference Case''_. R
  package version 0.0.19, <https://CRAN.R-project.org/package=fastei>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fastei: Methods for ''A Fast Alternative for the R x C Ecological
Inference Case''},
    author = {Charles Thraves and Pablo Ubilla and Daniel Hermosilla},
    year = {2026},
    note = {R package version 0.0.19},
    url = {https://CRAN.R-project.org/package=fastei},
  }