Geothermal Energy Geotherm Energy 2195-9706 12 2017 5 1 Simona Regenspurg Thorsten Schäfer http://orcid.org/0000-0002-7133-8717 9 21 2017 12 2017 18 s40517-017-0076-x 76 1 10.1007/springer_crossmark_policy link.springer.com false http://creativecommons.org/licenses/by/4.0 10.1186/s40517-017-0076-x 20170921091813277 http://geothermal-energy-journal.springeropen.com/articles/10.1186/s40517-017-0076-x http://link.springer.com/content/pdf/10.1186/s40517-017-0076-x.pdf http://link.springer.com/content/pdf/10.1186/s40517-017-0076-x.pdf http://link.springer.com/article/10.1186/s40517-017-0076-x/fulltext.html