To cite FRB in publications use:

  Van Aelst S, Willems G (2013). “Fast and Robust Bootstrap for
  Multivariate Inference: The R Package FRB.” _Journal of Statistical
  Software_, *53*(3), 1-32. doi:10.18637/jss.v053.i03
  <https://doi.org/10.18637/jss.v053.i03>,
  <https://www.jstatsoft.org/v53/i03/>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Fast and Robust Bootstrap for Multivariate Inference: The {R} Package {FRB}},
    journal = {Journal of Statistical Software},
    author = {Stefan {Van Aelst} and Gert Willems},
    year = {2013},
    volume = {53},
    number = {3},
    pages = {1--32},
    url = {https://www.jstatsoft.org/v53/i03/},
    doi = {10.18637/jss.v053.i03},
  }