To cite package ‘fastFGEE’ in publications use:

  Loewinger G (2026). _fastFGEE: Fast Functional Generalized Estimating
  Equations via a One-Step Estimator_. R package version 0.2.2,
  <https://CRAN.R-project.org/package=fastFGEE>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fastFGEE: Fast Functional Generalized Estimating Equations via a One-Step
Estimator},
    author = {Gabriel Loewinger},
    year = {2026},
    note = {R package version 0.2.2},
    url = {https://CRAN.R-project.org/package=fastFGEE},
  }