To cite R/lineup in publications use:

Broman et al. (2015) Identification and correction of sample mix-ups in expression genetic data: A case study. G3 5:2177-2186<doi:10.1534/g3.115.019778>

Corresponding BibTeX entry:

  @Article{Broman2015,
    title = {Identification and correction of sample mix-ups in
      expression genetic data: A case study},
    author = {Karl W. Broman and Mark P. Keller and Aimee Teo Broman
      and Christina Kendziorski and Brian S. Yandell and Śaunak Sen and
      Alan D. Attie},
    journal = {G3},
    year = {2015},
    volume = {5},
    pages = {2177-2186},
    doi = {10.1534/g3.115.019778},
    url = {https://doi.org/10.1534/g3.115.019778},
    eprint = {http://www.g3journal.org/content/ggg/5/10/2177.full.pdf},
  }