Geothermal heat pumps – ground source heat pumps (brochure of the European Geothermal Energy Council)

GEO.POWER (EU Project: Geothermal energy to address energy performance strategies in residential and industrial buildings)

Geotrainet (EU Project: Geo-Education for a sustainable geothermal heating and cooling market)

GRC Online Library (Database of the The Geothermal Resources Council), 2012

SEPEMO-Build (EU Project: SEasonal PErformance factor and MOnitoring for heat pump systems in the building sector)

GTRH Project (GeoThermal Regulation – Heat): Final Publishable Report, 2009