To rfVarImpOOB ranger in publications use:

Loecher M (2020). “Unbiased variable importance for random forests.” Communications in Statistics-Theory and Methods, 0(0), 1–13. doi:10.1080/03610926.2020.1764042.

Corresponding BibTeX entry:

  @Article{,
    title = {Unbiased variable importance for random forests},
    author = {Markus Loecher},
    journal = {Communications in Statistics-Theory and Methods},
    year = {2020},
    volume = {0},
    number = {0},
    pages = {1--13},
    doi = {10.1080/03610926.2020.1764042},
  }