To cite package ‘plac’ in publications use:

Wu F (2023). plac: A Pairwise Likelihood Augmented Cox Estimator for Left-Truncated Data. R package version 0.1.3, https://github.com/942kid/plac.

Corresponding BibTeX entry:

  @Manual{,
    title = {plac: A Pairwise Likelihood Augmented Cox Estimator for
      Left-Truncated Data},
    author = {Fan Wu},
    year = {2023},
    note = {R package version 0.1.3},
    url = {https://github.com/942kid/plac},
  }