To cite package gstat in publications use:

Pebesma, E.J., 2004. Multivariable geostatistics in S: the gstat package. Computers & Geosciences, 30: 683-691.

Benedikt Gräler, Edzer Pebesma and Gerard Heuvelink, 2016. Spatio-Temporal Interpolation using gstat. The R Journal 8(1), 204-218

Corresponding BibTeX entries:

  @Article{,
    title = {Multivariable geostatistics in S: the gstat package},
    author = {Edzer J. Pebesma},
    journal = {Computers & Geosciences},
    year = {2004},
    volume = {30},
    pages = {683-691},
  }
  @Article{,
    title = {Spatio-Temporal Interpolation using gstat},
    author = {Benedikt Gräler and Edzer Pebesma and Gerard Heuvelink},
    year = {2016},
    journal = {The R Journal},
    volume = {8},
    issue = {1},
    pages = {204-218},
    url =
      {https://journal.r-project.org/archive/2016-1/na-pebesma-heuvelink.pdf},
  }