To cite package ‘RCDT’ in publications use:

  Laurent S (2023). _RCDT: Fast 2D Constrained Delaunay Triangulation_.
  R package version 1.3.0, <https://github.com/stla/rcdt>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {RCDT: Fast 2D Constrained Delaunay Triangulation},
    author = {Stéphane Laurent},
    year = {2023},
    note = {R package version 1.3.0},
    url = {https://github.com/stla/rcdt},
  }