1. Lechner and Zmeureanu. Life cycle cost and energy analysis of a Net Zero Energy House with solar combisystem. Applied Energy 2010; August.
2. Sanner et al. Development and Demonstration of Ground Coupled Heat Pumps of High Technology. Proceedings World Geothermal Congress 2010; April 2010.
3. Bruno and Tinti - Sistemi geotermici per il condizionamento. La Termotecnica 2009;May.
4. CLM Baseline, 2000. Institute of Environmental Sciences of Leiden; January 2000.
5. Gianello. Confronto di Life Cycle Assessments applicati a sistemi ad energia rinnovabile: sonde geotermiche e pannelli solari termici .Master Thesis, University of Bologna, Department DICAM; March 2011. Software used.