Fonti

·                    http://www.cosvig-rtrt.regione.toscana.it/geoterm/geoterm.htm

·                    http://www.isesitalia.it/tec/txt_t009.html

·                     http://www.noalnucleareinbasilicata.com/noalnucleare.php?ap=420

·                     http://architettura.supereva.it/alt/altss_geotermia.html

·                     http://www.energoclub.it/a%20geotermico.htm

·                     http://www.verdi.it/document/geotermia/2.htm

·                     http://www.italy.indymedia.org/news/2003/12/441823.php

·                     http://cipres.cec.uchile.cl/~fmorales/mundo1.html

·                     http://digilander.libero.it/mfraterno/geotermica.htm

·                    http://www.enel.it