To cite package lidR in publications use both:

Roussel, J.R., Auty, D., Coops, N. C., Tompalski, P., Goodbody, T. R. H., Sánchez Meador, A., Bourdon, J.F., De Boissieu, F., Achim, A. (2020). lidR : An R package for analysis of Airborne Laser Scanning (ALS) data. Remote Sensing of Environment, 251 (August), 112061. <doi:10.1016/j.rse.2020.112061>.

Jean-Romain Roussel and David Auty (2026). Airborne LiDAR Data Manipulation and Visualization for Forestry Applications. R package version 4.3.2. https://cran.r-project.org/package=lidR

Corresponding BibTeX entries:

  @Article{,
    author = {Jean-Romain Roussel and David Auty and Nicholas C. Coops
      and Piotr Tompalski and Tristan R.H. Goodbody and Andrew Sánchez
      Meador and Jean-François Bourdon and Florian {de Boissieu} and
      Alexis Achim},
    title = {lidR: An R package for analysis of Airborne Laser Scanning
      (ALS) data},
    journal = {Remote Sensing of Environment},
    volume = {251},
    pages = {112061},
    year = {2020},
    issn = {0034-4257},
    doi = {10.1016/j.rse.2020.112061},
    url = {https://doi.org/10.1016/j.rse.2020.112061},
  }

  @Manual{,
    title = {Airborne LiDAR Data Manipulation and Visualization for
      Forestry Applications},
    author = {Jean-Romain Roussel and David Auty},
    year = {2026},
    note = {R package version 4.3.2},
    url = {https://cran.r-project.org/package=lidR},
  }