To cite the 'BootWPTOS' package in publications use:

  Alessandr Cardinali and Guy Nason (2022). BootWPTOS: Test
  Stationarity using Bootstrap Wavelet Packet Tests.R package version
  1.2.1.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {BootWPTOS: Test Stationarity using Bootstrap Wavelet Packet Tests},
    author = {Guy Nason and Alessandro Cardinali},
    year = {2022},
    note = {R package version 1.2.1},
  }

  Cardinali, A. and Nason, G.P. (2016) Practical Powerful Wavelet
  Packet Tests for Second-Order Stationarity Applied Computational
  Harmonic Analysis, doi=10.1016/j.acha.2016.06.006

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Practical Powerful Wavelet Packet Tests for Second-Order Stationarity},
    author = {A. Cardinali and G. P. Nason},
    journal = {Applied Computational Harmonic Analysis},
    volume = {0},
    doi = {10.1016/j.acha.2016.06.006},
    year = {2016},
    pages = {XXX--XXX},
    url = {http://www.stats.bris.ac.uk/~guy},
  }