To cite package ‘ZVCV’ in publications use:

  South L (2022). _ZVCV: Zero-Variance Control Variates_. R package
  version 2.1.2, <https://CRAN.R-project.org/package=ZVCV>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ZVCV: Zero-Variance Control Variates},
    author = {Leah F. South},
    year = {2022},
    note = {R package version 2.1.2},
    url = {https://CRAN.R-project.org/package=ZVCV},
  }