To cite the 'tmt' package in publications use:

Steinfeld J, Robitzsch A (2022). tmt: Estimation of the Rasch Model for Multistage Tests. R package version 0.3.1-2, https://CRAN.R-project.org/package=tmt.

Corresponding BibTeX entry:

  @Manual{,
    title = {tmt: Estimation of the Rasch Model for Multistage Tests},
    author = {Jan Steinfeld and Alexander Robitzsch},
    year = {2022},
    note = {R package version 0.3.1-2},
    url = {https://CRAN.R-project.org/package=tmt},
  }