To cite package ‘BFM’ in publications use:

  Guo G, Feng J (2026). _BFM: Beta Factor Model_. R package version
  0.2.11, <https://CRAN.R-project.org/package=BFM>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {BFM: Beta Factor Model},
    author = {Guangbao Guo and Jiahui Feng},
    year = {2026},
    note = {R package version 0.2.11},
    url = {https://CRAN.R-project.org/package=BFM},
  }