To cite MAMS in publications use:

Jaki T, Pallmann P, Magirr D (2019). “The R Package MAMS for Designing Multi-Arm Multi-Stage Clinical Trials.” Journal of Statistical Software, 88(4), 1–25. doi:10.18637/jss.v088.i04.

Corresponding BibTeX entry:

  @Article{,
    title = {The {R} Package {MAMS} for Designing Multi-Arm Multi-Stage
      Clinical Trials},
    author = {Thomas Jaki and Philip Pallmann and Dominic Magirr},
    journal = {Journal of Statistical Software},
    year = {2019},
    volume = {88},
    number = {4},
    pages = {1--25},
    doi = {10.18637/jss.v088.i04},
  }