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Reuters, October 28, 2011
Search Engine Watch, October 21, 2011
New York Times, October 17, 2011
Figaro, October 10, 2011
MediaPost, September 30, 2011
Mashable, September 26, 2011
Search Engine Watch, September 25, 2011
MediaPost, September 12, 2011
MediaPost, September 9, 2011
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