To cite gcKrig in publications use:

Han Z, De Oliveira V (2018). “gcKrig: An R Package for the Analysis of Geostatistical Count Data Using Gaussian Copulas.” Journal of Statistical Software, 87(13), 1–32. doi:10.18637/jss.v087.i13.

Corresponding BibTeX entry:

  @Article{,
    title = {{gcKrig}: An {R} Package for the Analysis of
      Geostatistical Count Data Using {G}aussian Copulas},
    author = {Zifei Han and Victor {De Oliveira}},
    journal = {Journal of Statistical Software},
    year = {2018},
    volume = {87},
    number = {13},
    pages = {1--32},
    doi = {10.18637/jss.v087.i13},
  }