To cite package ‘complex’ in publications use:

  Svetunkov I (2024). _complex: Time Series Analysis and Forecasting
  Using Complex Variables_. R package version 1.0.0,
  <https://CRAN.R-project.org/package=complex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {complex: Time Series Analysis and Forecasting Using Complex Variables},
    author = {Ivan Svetunkov},
    year = {2024},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=complex},
  }