To cite package geospt in publications use:

Melo, C., Santacruz, A., Melo, O. 2012. geospt: An R package for spatial statistics. R package version 1.0-0

Corresponding BibTeX entry:

  @Manual{,
    title = {geospt: An R package for spatial statistics.},
    author = {C. Melo and A. Santacruz and O. Melo},
    year = {2012},
    url = {geospt.r-forge.r-project.org/},
    note = {R package version 1.0-0},
  }