To cite griddy in publications use:

  Shkolnik D (2026). _griddy: Geospatial Distribution Dynamics for
  Simple Features_. R package version 0.1.0,
  <https://github.com/dshkol/griddy>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{griddy}: Geospatial Distribution Dynamics for Simple Features},
    author = {Dmitry Shkolnik},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/dshkol/griddy},
  }

  Rey, S. J. (2001). Spatial empirics for economic growth and
  convergence. Geographical Analysis, 33(3), 195-214.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Spatial empirics for economic growth and convergence},
    author = {Sergio J. Rey},
    journal = {Geographical Analysis},
    year = {2001},
    volume = {33},
    number = {3},
    pages = {195--214},
    doi = {10.1111/j.1538-4632.2001.tb00444.x},
  }