To cite package ‘varband’ in publications use:

  Yu G (2016). _varband: Variable Banding of Large Precision Matrices_.
  R package version 0.9.0,
  <https://CRAN.R-project.org/package=varband>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {varband: Variable Banding of Large Precision Matrices},
    author = {Guo Yu},
    year = {2016},
    note = {R package version 0.9.0},
    url = {https://CRAN.R-project.org/package=varband},
  }