To cite forestr in publications use:

J.W. Atkins, G. Bohrer, R.T. Fahey, B.S. Hardiman, T.H. Morin, A.E.L. Stovall, N. Zimmerman and C.M. Gough. Quantifying vegetation and canopy structural complexity from terrestrial LiDAR data using the forestr r package. Methods in Ecology and Evolution 9(10), 2057-2066.

Corresponding BibTeX entry:

  @Article{,
    title = {Quantifying vegetation and canopy structural complexity
      from terrestrial LiDAR data using the forestr r package},
    author = {Jeff Atkins and Gil Bohrer and Robert Fahey and Brady
      Hardiman and Timothy Morin and Atticus Stovall and Naupaka
      Zimmerman and Christopher Gough},
    journal = {Methods in Ecology and Evolution},
    year = {2018},
    volume = {9},
    number = {10},
    pages = {2057-2066},
    url = {https://CRAN.R-project.org/doc/Rnews/},
  }