To cite package ‘mmmgee’ in publications use:

Ristl R (2019). mmmgee: Simultaneous Inference for Multiple Linear Contrasts in GEE Models. R package version 1.20, https://CRAN.R-project.org/package=mmmgee.

Corresponding BibTeX entry:

  @Manual{,
    title = {mmmgee: Simultaneous Inference for Multiple Linear
      Contrasts in GEE Models},
    author = {Robin Ristl},
    year = {2019},
    note = {R package version 1.20},
    url = {https://CRAN.R-project.org/package=mmmgee},
  }