To cite SpatialPack in publications use:

Osorio F, Vallejos R (2020). Tools for assessment the association between two spatial processes. R package version 0.3-819, http://spatialpack.mat.utfsm.cl.

Corresponding BibTeX entry:

  @Manual{,
    title = {Tools for assessment the association between two spatial
      processes},
    author = {F. Osorio and R. Vallejos},
    year = {2020},
    note = {R package version 0.3-819},
    url = {http://spatialpack.mat.utfsm.cl},
  }