September 2013]. (原始内容存档于2013-12-19). Mulholland, Helene. George Osborne to cap welfare payments [奥斯本削减福利开支]. The Guardian (London). 4 October 2010 [4 October
cap carbon emissions. The Economist. [2018-05-10]. (原始内容存档于2018-05-11). Saul, Jonathan. Ship industry proposes $5 billion research fund to help cut emissions