@booklet {34189,
	title = {NORMAL GEOTHERMY-DESIGN PRINCIPLES OF GEOTHERMAL SYSTEMS AND APPLICATIONS},
	year = {2015},
	author = {Vrachopoulos, Michalis and Koukou, Maria and Karytsas, Konstantinos and Βραχόπουλος, Μιχάλης and Κούκου, Μαρία and Καρύτσας, Κωνσταντίνος}
}
