Study of the Dependence Effectiveness of Low-potential Heat of the Ground and Atmospheric Air for Heating Buildings from Climatic parametersGregory P. Vasilyev, Marina V. Kolesova, Victor F. Gornov and Igor A. YurchenkoMATEC Web of Conferences, 40 (2016) 05006DOI: https://doi.org/10.1051/matecconf/20164005006