To cite package ‘tukeytrend’ in publications use:

Schaarschmidt F, Ritz C (2020). tukeytrend: Tukeys Trend Test via Multiple Marginal Models. R package version 0.7, https://CRAN.R-project.org/package=tukeytrend.

Corresponding BibTeX entry:

  @Manual{,
    title = {tukeytrend: Tukeys Trend Test via Multiple Marginal
      Models},
    author = {Frank Schaarschmidt and Christian Ritz},
    year = {2020},
    note = {R package version 0.7},
    url = {https://CRAN.R-project.org/package=tukeytrend},
  }