To cite the geoknife package in publications use:

Read JS, JI Walker, A Appling, DL Blodgett, EK Read, LA Winslow. 2015. geoknife: Reproducible web-processing of large gridded datasets. Ecography.<doi:10.1111/ecog.01880>

Corresponding BibTeX entry:

  @Article{,
    author = {Jordan S. Read and Jordan I. Walker and Alison Appling
      and David L. Blodgett and Emily K. Read and Luke A. Winslow},
    title = {geoknife: Reproducible web-processing of large gridded
      datasets},
    journal = {Ecography},
    year = {2015},
    doi = {10.1111/ecog.01880},
    url =
      {http://onlinelibrary.wiley.com/doi/10.1111/ecog.01880/abstract},
  }