Reference: Team 2021

Team, R Core. 2021. R: A Language and Environment for Statistical Computing.

https://www.R-project.org/

@manual{R,
  address      = {Vienna, Austria},
  author       = {R Core Team},
  organization = {R Foundation for Statistical Computing},
  title        = {R: A Language and Environment for Statistical Computing},
  url          = {https://www.R-project.org/},
  year         = {2021}
}