MALCHO, M.; JANDACKA, J.; VANTUCH, M.; KAPJOR, A.; GAVLAS, S. Transfer of Low-Potential Heat from a Deep Borehole by Means of a Heat Pipe and Heat Pump. Communications - Scientific letters of the University of Zilina, v. 14, n. 4A, p. 18-22, 31 Dec. 2012.