http://contentmarketinginstitute.com/2013/06/essen...
http://www.huffingtonpost.com/elizabeth-oneill/con...
http://www.quicksprout.com/the-advanced-guide-to-c...
http://www.forbes.com/sites/work-in-progress/2012/...
http://blog.readz.com/ultimate-list-content-market...
http://www.demandmetric.com/content/content-market...