To cite the FORTLS package in publications use both:

Molina-Valero, J. A., Martínez-Calvo, A., Ginzo Villamayor, M. J., Novo Pérez, M. A., Álvarez-González, J. G., Montes, F., Pérez-Cruzado, C. (2022). Operationalizing the use of TLS in forest inventories: The R package FORTLS. Environmental Modelling & Software, 105337. <doi.org/10.1016/j.envsoft.2022.105337>.

Juan Alberto Molina-Valero, Adela Martínez-Calvo, Juan Gabriel Álvarez-González, Fernando Montes and César Pérez-Cruzado (2026). Automatic Processing of Terrestrial-Based Technologies Point Cloud Data for Forestry Purposes. R package version 2.0.1. https://CRAN.R-project.org/package=FORTLS

Corresponding BibTeX entries:

  @Article{,
    author = {Juan Alberto Molina-Valero and Adela Martínez-Calvo and
      Maria José Ginzo-Villamayor and Manuel Antonio Novo Pérez and
      Juan Gabriel Álvarez-González and Fernando Montes and César
      Pérez-Cruzado},
    title = {Operationalizing the use of TLS in forest inventories: The
      R package FORTLS},
    journal = {Environmental Modelling & Software},
    pages = {105337},
    year = {2022},
    doi = {10.1016/j.envsoft.2022.105337},
    url = {https://doi.org/10.1016/j.envsoft.2022.105337},
  }

  @Manual{,
    title = {Automatic Processing of Terrestrial-Based Technologies
      Point Cloud Data for Forestry Purposes},
    author = {Juan Alberto Molina-Valero and Adela Martínez-Calvo and
      Juan Gabriel Álvarez-González and Fernando Montes and César
      Pérez-Cruzado},
    year = {2026},
    note = {R package version 2.0.1},
    url = {https://CRAN.R-project.org/package=FORTLS},
  }