To cite boostmtree in publications use:

  Ishwaran H., Pande A. and Kogalur U.B. (2026). Boosted Multivariate
  Trees for Longitudinal Data, R package version 2.0.7; Cleveland
  Clinic Foundation patched build, not a CRAN release;
  https://github.com/ehrlinger/boostmtree_src.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Boosted Multivariate Trees for Longitudinal Data},
    author = {H. Ishwaran and A. Pande and U.B. Kogalur},
    publisher = {manual},
    year = {2026},
    note = {R package version 2.0.7; Cleveland Clinic Foundation patched build, not a CRAN release; https://github.com/ehrlinger/boostmtree_src},
    url = {https://github.com/ehrlinger/boostmtree_src},
  }