C.A. Balaras; E.G. Dascalaki; K.G. Droutsa; S. Kontoyiannidis; R. Guruz; G. Gudnason. Energy and Other Key Performance Indicators for Buildings– Examples for Hellenic Buildings. Glob. J. Energ. Technol. Res. Updat. 2015, 1, 71-89.