To cite package ‘surtvep’ in publications use:

Luo L, Wu W, He K (2023). surtvep: Cox Non-Proportional Hazards Model with Time-Varying Coefficients. R package version 1.0.0, https://CRAN.R-project.org/package=surtvep.

Corresponding BibTeX entry:

  @Manual{,
    title = {surtvep: Cox Non-Proportional Hazards Model with
      Time-Varying Coefficients},
    author = {Lingfeng Luo and Wenbo Wu and Kevin He},
    year = {2023},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=surtvep},
  }