To cite package ‘addhazard’ in publications use:

Hu J (2020). addhazard: Fit Additive Hazards Models for Survival Analysis. R package version 1.2.0, https://github.com/katehu/addhazard.

Corresponding BibTeX entry:

  @Manual{,
    title = {addhazard: Fit Additive Hazards Models for Survival
      Analysis},
    author = {Jie (Kate) Hu},
    year = {2020},
    note = {R package version 1.2.0},
    url = {https://github.com/katehu/addhazard},
  }