Cite web URL http://www.greencarcongress.com/2009/05/bmw-rankine-20090503.html Title BMW Study on Rankine Cycle for Waste Heat Recovery Shows Potential Additional 10% Power Output at Highway Speeds Source date 2009-05-03 Publisher Green Car Congress URL access date 2013-10-12 ↑ Stuart Birch (2012-02-03).