To cite package ‘genlasso’ in publications use:

  Arnold T, Tibshirani R (2022). _genlasso: Path Algorithm for
  Generalized Lasso Problems_. R package version 1.6.1,
  <https://github.com/ryantibs/genlasso>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {genlasso: Path Algorithm for Generalized Lasso Problems},
    author = {Taylor B. Arnold and Ryan J. Tibshirani},
    year = {2022},
    note = {R package version 1.6.1},
    url = {https://github.com/ryantibs/genlasso},
  }