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2. Philomena Bluyssen, EPIQR: IEQ part of EPIQR, TNO report 98-BBI-R0844, Delft, 1998.
3. C.A. Balaras, D.N. Asimakopoulos (Eds.), Final Technical Report on Energy, European Commission, Directorate General XII, for Science Research and Development, JOULE Program, EPIQR Project, Contract No. JOR3-CT96-0044, Athens, 1998.
4. C.A. Balaras, K. Droutsa, Retrofit of residential buildings — case studies for Hellenic buildings, IMPAE, NOA, 1998.