To cite boostmtree in publications use:

Ishwaran H. and Kogalur U.B. (2018). Boosted Multivariate Trees for Longitudinal Data, R package version 1.3.0.

Corresponding BibTeX entry:

  @Manual{,
    title = {Boosted Multivariate Trees for Longitudinal Data},
    author = {H. Ishwaran and A. Pande and U.B. Kogalur},
    publisher = {manual},
    year = {2018},
    note = {R package version 1.3.0},
    url = {https://cran.r-project.org/package=boostmtree},
    pdf =
      {https://cran.r-project.org/web/packages/boostmtree/boostmtree.pdf},
  }