To cite package ‘rmass2’ in publications use:

Wei Y, Sahu S, Hedeker D (2023). rmass2: Repeated Measures with Attrition: Sample Sizes and Power Levels for 2 Groups. R package version 0.0.0.2, https://CRAN.R-project.org/package=rmass2.

Corresponding BibTeX entry:

  @Manual{,
    title = {rmass2: Repeated Measures with Attrition: Sample Sizes and
      Power Levels for 2 Groups},
    author = {Yiheng Wei and Soumya Sahu and Donald Hedeker},
    year = {2023},
    note = {R package version 0.0.0.2},
    url = {https://CRAN.R-project.org/package=rmass2},
  }