To cite the bbreg manual in publications use:

Mayrink VD, Barreto-Souza W, Simas AB (2020). bbreg: Bessel and beta regressions via EM algorithm for continuous bounded data. R package version 1.0.0, https://CRAN.R-project.org/package=bbreg.

To cite the main reference about the bessel regression use:

Barreto-Souza W, Mayrink VD, Simas AB (2020). “Bessel regression model: Robustness to analyze bounded data.” arXiv:2003.05157.

Corresponding BibTeX entries:

  @Manual{,
    title = {{bbreg}: Bessel and beta regressions via EM algorithm for
      continuous bounded data},
    author = {Vinicius D. Mayrink and Wagner Barreto-Souza and
      Alexandre B. Simas},
    year = {2020},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=bbreg},
  }

  @Misc{,
    title = {Bessel regression model: Robustness to analyze bounded
      data},
    author = {Wagner Barreto-Souza and Vinicius D. Mayrink and
      Alexandre B. Simas},
    year = {2020},
    eprint = {arXiv:2003.05157},
    archiveprefix = {arXiv},
    primaryclass = {stat.ME},
  }