To cite package ‘PoSI’ in publications use:

Buja A, Zhang K (2020). PoSI: Valid Post-Selection Inference for Linear LS Regression. R package version 1.1, https://CRAN.R-project.org/package=PoSI.

Corresponding BibTeX entry:

  @Manual{,
    title = {PoSI: Valid Post-Selection Inference for Linear LS
      Regression},
    author = {Andreas Buja and Kai Zhang},
    year = {2020},
    note = {R package version 1.1},
    url = {https://CRAN.R-project.org/package=PoSI},
  }