To cite package ‘splineCox’ in publications use:

  Teranishi R (2024). _splineCox: A Two-Stage Estimation Approach to
  Cox Regression Using M-Spline Function_. R package version 0.0.1,
  <https://github.com/ren1227/splinecox>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {splineCox: A Two-Stage Estimation Approach to Cox Regression Using M-Spline
Function},
    author = {Ren Teranishi},
    year = {2024},
    note = {R package version 0.0.1},
    url = {https://github.com/ren1227/splinecox},
  }