To cite package 'rpact' in publications use:

Wassmer G, Pahlke F (2026). rpact: Confirmatory Adaptive Clinical Trial Design and Analysis. doi:10.32614/CRAN.package.rpact, R package version 4.4.0, https://CRAN.R-project.org/package=rpact.

Wassmer G, Brannath W (2025). Group Sequential and Confirmatory Adaptive Designs in Clinical Trials, 2nd edition. Springer, Cham, Switzerland. ISBN 978-3-031-89668-2, doi:10.1007/978-3-031-89669-9.

Corresponding BibTeX entries:

  @Manual{,
    title = {rpact: Confirmatory Adaptive Clinical Trial Design and
      Analysis},
    author = {Gernot Wassmer and Friedrich Pahlke},
    year = {2026},
    note = {R package version 4.4.0},
    doi = {10.32614/CRAN.package.rpact},
    url = {https://CRAN.R-project.org/package=rpact},
  }

  @Book{,
    title = {Group Sequential and Confirmatory Adaptive Designs in
      Clinical Trials},
    author = {Gernot Wassmer and Werner Brannath},
    year = {2025},
    edition = {2nd},
    publisher = {Springer},
    address = {Cham, Switzerland},
    isbn = {978-3-031-89668-2},
    doi = {10.1007/978-3-031-89669-9},
  }