To cite package ‘ncf’ in publications use:

Bjornstad ON (2022). ncf: Spatial Covariance Functions. R package version 1.3-2, https://github.com/objornstad/ncf.

Corresponding BibTeX entry:

  @Manual{,
    title = {ncf: Spatial Covariance Functions},
    author = {Ottar N. Bjornstad},
    year = {2022},
    note = {R package version 1.3-2},
    url = {https://github.com/objornstad/ncf},
  }