To cite package ‘lumbermark’ in publications use:

  Gagolewski M (2026). _lumbermark: Resistant Clustering via Chopping
  Up Mutual Reachability Minimum Spanning Trees_. R package version
  0.9.0.9001, <https://github.com/gagolews/lumbermark>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {lumbermark: Resistant Clustering via Chopping Up Mutual Reachability Minimum
Spanning Trees},
    author = {Marek Gagolewski},
    year = {2026},
    note = {R package version 0.9.0.9001},
    url = {https://github.com/gagolews/lumbermark},
  }