To cite concordance in publications, please use:

  Steven Liao, In Song Kim, Sayumi Miyano, Hao Zhang (2020).
  concordance: Product Concordance. R package version 2.0.0.
  https://CRAN.R-project.org/package=concordance

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {concordance: Product Concordance},
    author = {Steven Liao and In Song Kim and Sayumi Miyano and Hao Zhang},
    year = {2020},
    note = {R package version 2.0.0},
    url = {https://CRAN.R-project.org/package=concordance},
  }