To cite package ‘Bessel’ in publications use:

  Maechler M (2026). _Bessel: Computations and Approximations for
  Bessel Functions_. R package version 0.7-1,
  <https://r-forge.r-project.org/projects/specfun>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Bessel: Computations and Approximations for Bessel Functions},
    author = {Martin Maechler},
    year = {2026},
    note = {R package version 0.7-1},
    url = {https://r-forge.r-project.org/projects/specfun},
  }
