Petchers, Neil. Combined heating, cooling & power handbook: technologies & applications an integrated approach to energy resource optimization. 2nd ed. Lilburn: Fairmont Press ; London, c2012. ISBN 978-0-88173-689-2.
Watkins, David E. Heating services in buildings: design, installation, commissioning & maintenance. Chichester: Wiley-Blackwell, 2011. ISBN 978-0-4706-5603-7.