To cite RGAP in publications use:

Sina Streicher (2022). RGAP: Output gap estimation in R. KOF Working Paper 503.

Corresponding BibTeX entry:

  @Article{,
    title = {{RGAP}: Output gap estimation in {R}},
    author = {Sina Streicher},
    journal = {{KOF} Working Papers},
    number = {503},
    year = {2022},
  }