https://fonolo.com/blog/2014/02/20-important-customer-experience-statistics-for-2014/
https://www.linkedin.com/today/post/article/ 20130604134550284615-15-statistics-that-should-change-the-business-world-but-haven-t
http://www.strategy-business.com/article/11304?pg=all
http://static.hbr.org/hbrg-main/resources/pdfs/tools/ Siemens_Report_May2014.pdf
http://www.infoentrepreneurs.org/en/guides/the-challenges-of-growing-a-business—and-how-to-meet-them/