To cite package ‘hexDensity’ in publications use:

  Nguyen Q, Chen Y (2025). _hexDensity: Fast Kernel Density Estimation
  with Hexagonal Grid_. R package version 1.4.8,
  <https://github.com/chenlaboratory/hexdensity>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {hexDensity: Fast Kernel Density Estimation with Hexagonal Grid},
    author = {Quoc Hoang Nguyen and Yunshun Chen},
    year = {2025},
    note = {R package version 1.4.8},
    url = {https://github.com/chenlaboratory/hexdensity},
  }