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2. CEPHEUS: Cost Efficient Passive Houses as European Standards, Project Information, http://www.cepheus.de/, viewable, March 2005.
3. Renewable energy for passive house heating, I. Building description;Badescu;Building and Energy,2003
4. Renewable energy for passive house heating, II. Model;Badescu;Building and Energy,2003
5. Passivhaus—Projectierungs—Paket (PHPP) mit Handbuch, Darmstadt Ausgabe, 2002.