Please cite 'future' and the future framework using the following
references:

  Henrik Bengtsson, A Unifying Framework for Parallel and Distributed
  Processing in R using Futures, The R Journal (2021) 13:2, pages
  208-227, doi:10.32614/RJ-2021-048

A BibTeX entry for LaTeX users is

  @Article{RJ-2021-048,
    author = {Henrik Bengtsson},
    title = {A Unifying Framework for Parallel and Distributed Processing in R using Futures},
    year = {2021},
    journal = {The R Journal},
    doi = {10.32614/RJ-2021-048},
    url = {https://doi.org/10.32614/RJ-2021-048},
    pages = {208--227},
    volume = {13},
    number = {2},
  }