To cite FRK in publications use:

Zammit-Mangion A, Cressie N (2021). “FRK: An R Package for Spatial and Spatio-Temporal Prediction with Large Datasets.” Journal of Statistical Software, 98(4), 1–48. doi: 10.18637/jss.v098.i04.

Corresponding BibTeX entry:

  @Article{,
    title = {{FRK}: An {R} Package for Spatial and Spatio-Temporal
      Prediction with Large Datasets},
    author = {Andrew Zammit-Mangion and Noel Cressie},
    journal = {Journal of Statistical Software},
    year = {2021},
    volume = {98},
    number = {4},
    pages = {1--48},
    doi = {10.18637/jss.v098.i04},
  }