To cide forestError in publications, please use:

Lu B, Hardin J (2019+). “A Unified Framework for Random Forest Prediction Error Estimation.” arXiv preprint arXiv:1912.07435.

Corresponding BibTeX entry:

  @Article{,
    title = {A Unified Framework for Random Forest Prediction Error
      Estimation},
    author = {Benjamin Lu and Johanna Hardin},
    journal = {arXiv preprint arXiv:1912.07435},
    year = {2019+},
  }