1. COGEN Europe (The European Association for the Promotion of Cogeneration, www.cogen.org). The European educational tool on cogeneration, 2nd ed. December 2001.
2. Institute for Promotion of Innovative Technologies (Italy), Wen Guo. The state-of-the art of tri-generation and its application in tertiary sector.
3. Energy and Environmental Analysis, Inc. Market potential for advanced thermally activated BCHP in five national account sectors. May 2003.
4. Hawaii Commercial Building Guidelines for Energy Efficiency: Chapter 9. Building cooling, heating and power generation systems.
5. Shipley AM, Neal Elliott R. (The American Council for an Energy-Efficient Economy). Distributed energy resources and combined heat and power: a declaration of terms. April 2000.