«Gartner Says Customer Relationship Management Software Market Grew 13.3 Percent», Gartner, May 19, 2015: gartner.com/newsroom/id/3056118

Shira Ovide and Elizabeth Dwoskin «The Data-Driven Rebirth of a Salesman», Wall Street Journal, September 17, 2015: http://www.wsj.com/articles/the-data-driven-rebirth-of-a-salesman-1442534375