To cite package ‘UPSvarApprox’ in publications use:

Sichera R (2023). UPSvarApprox: Approximate the Variance of the Horvitz-Thompson Total Estimator. R package version 0.1.4, https://github.com/rhobis/upsvarapprox.

Corresponding BibTeX entry:

  @Manual{,
    title = {UPSvarApprox: Approximate the Variance of the
      Horvitz-Thompson Total Estimator},
    author = {Roberto Sichera},
    year = {2023},
    note = {R package version 0.1.4},
    url = {https://github.com/rhobis/upsvarapprox},
  }