To cite SpatialPack in publications use:

Osorio, F., Vallejos, R. (2019). Tools for assessment the association between two spatial processes. R package version 0.3-8. URL: 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 = {2019},
    note = {R package version 0.3-8},
    url = {http://spatialpack.mat.utfsm.cl},
  }