To cite bootUR in publications use:

  Smeekes S, Wilms I (2023). “bootUR: An R Package for Bootstrap Unit
  Root Tests.” _Journal of Statistical Software_, *106*(12), 1-39.
  doi:10.18637/jss.v106.i12 <https://doi.org/10.18637/jss.v106.i12>.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{bootUR}: An {R} Package for Bootstrap Unit Root Tests},
    author = {Stephan Smeekes and Ines Wilms},
    journal = {Journal of Statistical Software},
    year = {2023},
    volume = {106},
    number = {12},
    pages = {1--39},
    doi = {10.18637/jss.v106.i12},
  }