To cite package ‘longmemo’ in publications use:

  Beran J, Maechler M (2024). _longmemo: Statistics for Long-Memory
  Processes (Book Jan Beran), and Related Functionality_. R package
  version 1.1-3, <https://CRAN.R-project.org/package=longmemo>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {longmemo: Statistics for Long-Memory Processes (Book Jan Beran), and
Related Functionality},
    author = {Jan Beran and Martin Maechler},
    year = {2024},
    note = {R package version 1.1-3},
    url = {https://CRAN.R-project.org/package=longmemo},
  }