To cite package ‘OSsurvival’ in publications use:

  Wang X, Bonzel C, Cai T, Parast L, PARSE LTD (2022). _OSsurvival:
  Assessing Surrogacy with a Censored Outcome_. R package version 1.0,
  <https://CRAN.R-project.org/package=OSsurvival>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {OSsurvival: Assessing Surrogacy with a Censored Outcome},
    author = {Xuan Wang and Clara-Lea Bonzel and Tianxi Cai and Layla Parast and {PARSE LTD}},
    year = {2022},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=OSsurvival},
  }