The following are references to the package. You should also reference the individual methods used, as detailed in the reference section of the help files for each function.

Clerc-Urmès I, Grzebyk M, Hédelin G and CENSUR working survival group (2017). flexrsurv: An R package for relative survival analysis. R package version 1.4.1, https://CRAN.R-project.org/package=flexrsurv.

To get Bibtex entries use: x<-citation("flexrsurv"); toBibtex(x)

Corresponding BibTeX entry:

  @Manual{,
    title = {{flexrsurv}: An {R} package for relative survival
      analysis},
    author = {Isabelle Clerc-Urmès and Michel Grzebyk and Guy Hédelin
      and {CENSUR working survival group}},
    year = {2017},
    url = {https://CRAN.R-project.org/package=flexrsurv},
    note = {R package version 1.4.1},
  }