To cite package ‘odin’ in publications use:

  FitzJohn R (2025). _odin: ODE Generation and Integration_. R package
  version 1.2.7, <https://CRAN.R-project.org/package=odin>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {odin: ODE Generation and Integration},
    author = {Rich FitzJohn},
    year = {2025},
    note = {R package version 1.2.7},
    url = {https://CRAN.R-project.org/package=odin},
  }