To cite xtfifevd in publications use:

  Alkhalaf M (2026). _Panel Fixed Effects Filtered and Variance
  Decomposition Estimation_. doi:10.32614/CRAN.package.xtfifevd
  <https://doi.org/10.32614/CRAN.package.xtfifevd>. R package version
  1.0.0, <https://CRAN.R-project.org/package=xtfifevd>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Panel Fixed Effects Filtered and Variance Decomposition Estimation},
    author = {Muhammad Abdullah Alkhalaf},
    year = {2026},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=xtfifevd},
    doi = {10.32614/CRAN.package.xtfifevd},
  }