To cite package ‘vcpen’ in publications use:

Sinnwell J, Schaid D (2022). vcpen: Penalized Variance Components Analysis. R package version 1.9, https://CRAN.R-project.org/package=vcpen.

Corresponding BibTeX entry:

  @Manual{,
    title = {vcpen: Penalized Variance Components Analysis},
    author = {Jason Sinnwell and Daniel Schaid},
    year = {2022},
    note = {R package version 1.9},
    url = {https://CRAN.R-project.org/package=vcpen},
  }