http://www.nature.com/press_releases/Britannica_response.pdf
Encyclopaedia Britannica and Nature: a response In our issue of 15 December 2005 we published a news article that compared the Internet offerings of Encyclopaedia Britannica and Wikipedia on scientific topics ("Internet encyclopaedias go head to head", Nature 438 (7070) p900-901). Encyclopaedia Britannica has now posted a lengthy response to this article on its website, accusing Nature of misrepresentation, sloppiness and indifference to scholarly standards, and calling on us to retract our article. We reject those accusations, and are confident our comparison was fair.