To cite package ‘plmmr’ in publications use:

  Reisetter A, Breheny P (2021). “Penalized linear mixed models for
  structured genetic data.” _Genetic epidemiology_, *45*(5), 427-444.
  <https://doi.org/10.1002/gepi.22384>.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {Anna C. Reisetter and Patrick Breheny},
    title = {Penalized linear mixed models for structured genetic data},
    journal = {Genetic epidemiology},
    year = {2021},
    volume = {45},
    pages = {427--444},
    number = {5},
    url = {https://doi.org/10.1002/gepi.22384},
  }