To cite package ‘twoPhaseGAS’ in publications use:

  Espin-Garcia O, Dimitromanolakis A (2026). _twoPhaseGAS: Two-Phase
  Genetic Association Study Design and Analysis with Missing Covariates
  by Design_. R package version 1.2.5,
  <https://CRAN.R-project.org/package=twoPhaseGAS>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {twoPhaseGAS: Two-Phase Genetic Association Study Design and Analysis with
Missing Covariates by Design},
    author = {Osvaldo Espin-Garcia and Apostolos Dimitromanolakis},
    year = {2026},
    note = {R package version 1.2.5},
    url = {https://CRAN.R-project.org/package=twoPhaseGAS},
  }