To cite backbone in publications use:

Domagalski R, Neal Z, Sagan B (2020). backbone: Extracts the Backbone from Weighted Graphs. R package version 1.2.1, https://CRAN.R-project.org/package=backbone.

Corresponding BibTeX entry:

  @Manual{,
    title = {{backbone}: Extracts the Backbone from Weighted Graphs},
    author = {Rachel Domagalski and Zachary Neal and Bruce Sagan},
    year = {2020},
    note = {R package version 1.2.1},
    url = {https://CRAN.R-project.org/package=backbone},
  }