To cite package ‘stilt’ in publications use:

  Olson R, Chang W, Keller K, Haran M (2025). _stilt: Separable
  Gaussian Process Interpolation (Emulation)_. R package version 1.3.1,
  <https://CRAN.R-project.org/package=stilt>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {stilt: Separable Gaussian Process Interpolation (Emulation)},
    author = {Roman Olson and Won Chang and Klaus Keller and Murali Haran},
    year = {2025},
    note = {R package version 1.3.1},
    url = {https://CRAN.R-project.org/package=stilt},
  }
