To cite package ‘hera’ in publications use:

  François R (2026). _hera: Companion to the 'xeus-r' 'jupyter'
  Kernel_. R package version 0.6.0.9000,
  <https://github.com/jupyter-xeus/xeus-r>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {hera: Companion to the 'xeus-r' 'jupyter' Kernel},
    author = {Romain François},
    year = {2026},
    note = {R package version 0.6.0.9000},
    url = {https://github.com/jupyter-xeus/xeus-r},
  }