Title from PDF caption (viewed on Apr. 26, 2012).
"Impact assessment, IA no. DECC0053. Date: 11/05/2011."
"Publisher's no.: URN 10/1268.
Setting the limit on the use of international carbon units for the second carbon budget period (2013-2017). Published by Dept. of Energy & Climate Change in 2011. Publication and catalogue information, links to buy online and reader comments.