To cite package ‘pika’ in publications use:

  Ainslie K (2026). _pika: Evaluate Correlation Between Time Series_. R
  package version 0.2.0, <https://github.com/mrc-ide/pika>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {pika: Evaluate Correlation Between Time Series},
    author = {Kylie Ainslie},
    year = {2026},
    note = {R package version 0.2.0},
    url = {https://github.com/mrc-ide/pika},
  }