Galgaro, A., Santa, G. D., De Carli, M., Emmi, G., Zarrella, A., Mueller, J., et al. (2019). New tools to support the designing of efficient and reliable ground source heat exchangers: The Cheap-GSHPs databases and maps. Advances In Geosciences. http://doi.org/10.5194/adgeo-49-47-2019