To cite package ‘ssrm.logmer’ in publications use:

Kapur K (2018). ssrm.logmer: Sample Size Determination for Longitudinal Designs with Binary Outcome. R package version 0.1, https://CRAN.R-project.org/package=ssrm.logmer.

Corresponding BibTeX entry:

  @Manual{,
    title = {ssrm.logmer: Sample Size Determination for Longitudinal
      Designs with Binary Outcome},
    author = {Kush Kapur},
    year = {2018},
    note = {R package version 0.1},
    url = {https://CRAN.R-project.org/package=ssrm.logmer},
  }