To cite package ‘xtvfreg’ in publications use:

Liao T (2025). xtvfreg: Variance Function Panel Regression. R package version 1.1.0, https://CRAN.R-project.org/package=xtvfreg.

Corresponding BibTeX entry:

  @Manual{,
    title = {xtvfreg: Variance Function Panel Regression},
    author = {Tim F. Liao},
    year = {2025},
    note = {R package version 1.1.0},
    url = {https://CRAN.R-project.org/package=xtvfreg},
  }