The United Kingdom was second only to the United States in terms of total scientific-paper citations last year, says a report prepared for the UK Department of Business, Innovation and Skills. International Comparative Performance of the UK Research Base — 2011, released in October by publishing company Elsevier in Amsterdam, finds that in 2010, UK papers had 3.46 million citations; those from the United States had 13.2 million. Britain also outperforms all nations for articles produced per unit of research spending. Meanwhile, Brazil, Russia, India and China have increased their share of the world's published science papers. China's share climbed from about 12% in 2006 to just over 17% in 2010, the report says.