To cite package ‘freebird’ in publications use:

Zhou R, Zhao D (2022). freebird: Estimation and Inference for High Dimensional Mediation and Surrogate Analysis. R package version 1.0, https://CRAN.R-project.org/package=freebird.

Corresponding BibTeX entry:

  @Manual{,
    title = {freebird: Estimation and Inference for High Dimensional
      Mediation and Surrogate Analysis},
    author = {Ruixuan Zhou and Dave Zhao},
    year = {2022},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=freebird},
  }