To cite CoopGame in publications use:

  Staudacher, J., and Anwander, J. (2019). Using the R package CoopGame
  for the analysis, solution and visualization of cooperative games
  with transferable utility; {R} Vignette; 2019 .

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Using the R package CoopGame for the analysis, solution and visualization of cooperative games with transferable utility},
    note = {{R} Vignette},
    url = {https://cran.r-project.org/package=CoopGame},
    year = {2019},
    author = {J. Staudacher and J. Anwander},
  }

We have invested a lot of time and effort in creating the package
CoopGame and its vignette, please cite it when using it in research or
teaching.