To cite package ‘focus’ in publications use:

  Romano G, Ward K, Fan Y, Rigaill G, Runge V, Fearnhead P, Eckley I
  (2026). _focus: Online Changepoint Detection in Univariate and
  Multivariate Data Streams_. R package version 0.1.5,
  <https://CRAN.R-project.org/package=focus>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {focus: Online Changepoint Detection in Univariate and Multivariate Data
Streams},
    author = {Gaetano Romano and Kes Ward and Yuntang Fan and Guillem Rigaill and Vincent Runge and Paul Fearnhead and Idris A. Eckley},
    year = {2026},
    note = {R package version 0.1.5},
    url = {https://CRAN.R-project.org/package=focus},
  }