To cite the package 'REEMtree' in publications, use:

Rebecca J. Sela and Jeffrey S. Simonoff (2011), REEMtree: Regression Trees with Random Effects. R package version 0.90.3.

Corresponding BibTeX entry:

  @Manual{,
    title = {REEMtree: Regression Trees with Random Effects},
    author = {Rebecca J. Sela and Jeffrey S. Simonoff},
    year = {2011},
    note = {R package version 0.90.3},
  }