To cite adoptr in publications use:

Kunzmann K, Pilz M, Herrmann C, Rauch G, Kieser M (2021). “The adoptr Package: Adaptive Optimal Designs for Clinical Trials in R.” Journal of Statistical Software, 98(9), 1–21. doi: 10.18637/jss.v098.i09.

Corresponding BibTeX entry:

  @Article{,
    title = {The {adoptr} Package: Adaptive Optimal Designs for
      Clinical Trials in {R}},
    author = {Kevin Kunzmann and Maximilian Pilz and Carolin Herrmann
      and Geraldine Rauch and Meinhard Kieser},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {98},
    number = {9},
    pages = {1--21},
    doi = {10.18637/jss.v098.i09},
  }