1. World geothermal power generation in the period 2001-2005;Bertani;Geothermics,2005
2. Geothermal power generation in the World, 2005-2010 update report;Bertani,2010
3. Direct utilization of geothermal energy 2020 worldwide review;Lund,2021
4. Larderello–100 years of geothermal power plant evolution in Italy, Geothermal Power Generation and Development, Unione Nazionale Geotermica, Pisa. Italy,;Parri;Geotherm. Power Gener. Dev. Innov.,2016
5. Dickson, M., and Fanelli, M., Geothermal energy–Utilization and technology, UNESCO, Paris, 2003, 224 p. Also, by: Routledge, Taylor and Francis Group, 2013.