To cite 'specr' in publications use:

Masur P, Scharkow M (2020). “specr: Conducting and Visualizing Specification Curve Analyses (Version 1.0.0).” https://CRAN.R-project.org/package=specr.

Corresponding BibTeX entry:

  @Misc{,
    title = {specr: Conducting and Visualizing Specification Curve
      Analyses (Version 1.0.0)},
    author = {Philipp K. Masur and Michael Scharkow},
    year = {2020},
    url = {https://CRAN.R-project.org/package=specr},
  }