To cite rFerns in publications use:

  Kursa MB (2014). “rFerns: An Implementation of the Random Ferns
  Method for General-Purpose Machine Learning.” _Journal of Statistical
  Software_, *61*(10), 1-13. <https://www.jstatsoft.org/v61/i10/>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {rFerns: An Implementation of the Random Ferns Method for General-Purpose Machine Learning},
    author = {Miron B. Kursa},
    journal = {Journal of Statistical Software},
    year = {2014},
    volume = {61},
    number = {10},
    pages = {1--13},
    url = {https://www.jstatsoft.org/v61/i10/},
  }