Cerutti, Paolo. “[Geothermal Heat Pump Systems for Underground Geoexchange: A Ripe Opportunity for the Present, a Prospect to Be Developed for the Future]”. Acque Sotterranee - Italian Journal of Groundwater 12, no. 3 (September 29, 2023): 103–105. Accessed December 4, 2024. https://www.acquesotterranee.net/acque/article/view/720.