To cite package ‘survivalsurrogate’ in publications use:

  Agniel D, Parast L (2025). _survivalsurrogate: Evaluate a
  Longitudinal Surrogate with a Censored Outcome_. R package version
  1.1, <https://CRAN.R-project.org/package=survivalsurrogate>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {survivalsurrogate: Evaluate a Longitudinal Surrogate with a Censored Outcome},
    author = {Denis Agniel and Layla Parast},
    year = {2025},
    note = {R package version 1.1},
    url = {https://CRAN.R-project.org/package=survivalsurrogate},
  }