To cite the R package smoothHR in publications use:

Araújo A, Meira-Machado L (2021). smoothHR: Smooth Hazard Ratio Curves Taking a Reference Value. R package version 1.0.3, https://CRAN.R-project.org/package=smoothHR.

Meira-Machado L, Cadarso-Suárez C, Gude F, Araújo A (2013). “smoothHR: An R Package for Pointwise Nonparametric Estimation of Hazard Ratio Curves of Continuous Predictors.” Computational and Mathematical Methods in Medicine, 2013, 1–11. ISSN 1748-6718, doi: 10.1155/2013/745742.

Corresponding BibTeX entries:

  @Manual{,
    title = {smoothHR: Smooth Hazard Ratio Curves Taking a Reference
      Value},
    author = {Artur Ara\'{u}jo and Lu\'{i}s Meira-Machado},
    year = {2021},
    note = {R package version 1.0.3},
    url = {https://CRAN.R-project.org/package=smoothHR},
  }

  @Article{,
    title = {smoothHR: An R Package for Pointwise Nonparametric
      Estimation of Hazard Ratio Curves of Continuous Predictors},
    author = {Lu\'{i}s Meira-Machado and Carmen Cadarso-Su\'{a}rez and
      Francisco Gude and Artur Ara\'{u}jo},
    journal = {Computational and Mathematical Methods in Medicine},
    issn = {1748-6718},
    year = {2013},
    volume = {2013},
    pages = {1--11},
    doi = {10.1155/2013/745742},
  }