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1. Creative Content VS Panda vince blackham @vinceblackham
2. google is making a strong push towards socialhttp://techcrunch.com/2011/06/03/google-acquires-postrank-an-analytics-service-for-the-social-web/
3. 52 changes in april http://insidesearch.blogspot.co.uk/2012/05/search-quality- highlights-53-changes.html
4. diversityfreshnessqualityauthority 6 relating to content
5. it’s not that links carry less weight, but rather thatthere’s more weight to distribute overall. http://www.seobythesea.com/2012/05/social-circles-content-sharing- visibility-google-plus/