@Manual{R:2003,
  title        = {R: A language and environment for statistical computing},
  author       = {{R Development Core Team}},
  organization = {R Foundation for Statistical Computing},
  address      = {Vienna, Austria},
  year         = {2003},
  note         = {ISBN 3-900051-00-3},
  url          = {http://www.R-project.org}
}

@InProceedings{Camara,
  author    = 	 {Câmara, G. and others},
  title     = 	 {TerraLib: Technology in Support of GIS Innovation},
  booktitle = 	 {II Workshop Brasileiro de Geoinformática, GeoInfo2000},
  address   =    {São Paulo, Brazil},
  year      =    {2000}
}
