To cite package ‘odin’ in publications use:

  FitzJohn R (2024). _odin: ODE Generation and Integration_. R package
  version 1.5.11, <https://github.com/mrc-ide/odin>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {odin: ODE Generation and Integration},
    author = {Rich FitzJohn},
    year = {2024},
    note = {R package version 1.5.11},
    url = {https://github.com/mrc-ide/odin},
  }