To cite oottest in publications use:

Külpmann, Philipp and Panagiota Charalampidou (2022). oottest: Out-of-Treatment Testing in R. https://github.com/PhilippKuelpmann/oottest

Corresponding BibTeX entry:

  @Manual{,
    title = {{oottest}: Out-of-Treatment Testing in R},
    author = {Philipp Külpmann and Panagiota Charalampidou},
    year = {2022},
    url = {https://github.com/PhilippKuelpmann/oottest},
  }