To cite package ‘spopt’ in publications use:

  Walker K (2026). _spopt: Spatial Optimization for Regionalization,
  Facility Location, and Market Analysis_. R package version 0.1.2,
  <https://github.com/walkerke/spopt-r>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {spopt: Spatial Optimization for Regionalization, Facility Location, and
Market Analysis},
    author = {Kyle Walker},
    year = {2026},
    note = {R package version 0.1.2},
    url = {https://github.com/walkerke/spopt-r},
  }