To cite downscale in publications use:

Marsh CJ, Barwell LJ, Gavish Y, Kunin WE (2018). “downscale: An R Package for Downscaling Species Occupancy from Coarse-Grain Data to Predict Occupancy at Fine-Grain Sizes.” Journal of Statistical Software, Code Snippets, 86(3), 1–20. doi: 10.18637/jss.v086.c03.

Corresponding BibTeX entry:

  @Article{,
    title = {{downscale}: An {R} Package for Downscaling Species
      Occupancy from Coarse-Grain Data to Predict Occupancy at
      Fine-Grain Sizes},
    author = {Charles J. Marsh and Louise J. Barwell and Yoni Gavish
      and William E. Kunin},
    journal = {Journal of Statistical Software, Code Snippets},
    year = {2018},
    volume = {86},
    number = {3},
    pages = {1--20},
    doi = {10.18637/jss.v086.c03},
  }