To cite survHE in publications use:

Baio G (2020). “survHE: Survival Analysis for Health Economic Evaluation and Cost-Effectiveness Modeling.” Journal of Statistical Software, 95(14), 1–47. doi: 10.18637/jss.v095.i14.

Corresponding BibTeX entry:

  @Article{,
    title = {{survHE}: Survival Analysis for Health Economic Evaluation
      and Cost-Effectiveness Modeling},
    author = {Gianluca Baio},
    journal = {Journal of Statistical Software},
    year = {2020},
    volume = {95},
    number = {14},
    pages = {1--47},
    doi = {10.18637/jss.v095.i14},
  }