To cite package ‘nparsurv’ in publications use:

Kroener C, Friedrich S (2017). nparsurv: Nonparametric Tests for Main Effects, Simple Effects and Interaction Effect in a Factorial Design with Censored Data. R package version 0.1.0, https://CRAN.R-project.org/package=nparsurv.

Corresponding BibTeX entry:

  @Manual{,
    title = {nparsurv: Nonparametric Tests for Main Effects, Simple
      Effects and Interaction Effect in a Factorial Design with
      Censored Data},
    author = {Christine Kroener and Sarah Friedrich},
    year = {2017},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=nparsurv},
  }