To cite mixpower in publications use:

  Alex Litovchenko M (2024). _mixpower: Simulation-Based Power Analysis
  for Linear Mixed-Effects Models_. R package version 0.1.0.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mixpower: Simulation-Based Power Analysis for Linear Mixed-Effects Models},
    author = {Mixpower {Alex Litovchenko}},
    year = {2024},
    note = {R package version 0.1.0},
  }