To cite kcopula in publications use:

Kremer M (2020). kcopula: The Bivariate K-Copula. R package version 0.1.0, https://CRAN.R-project.org/package=kcopula.

Corresponding BibTeX entry:

  @Manual{,
    title = {kcopula: The Bivariate K-Copula},
    author = {Marcel Kremer},
    year = {2020},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=kcopula},
  }