Flylib.com, “ERP Market Penetration,” по состоянию на 22 января 2017 года, .
89
Sinan Aral, D. J. Wu, and Erik Brynjolfsson, “Which Came First, IT or Productivity? The Virtuous Cycle of Investment and Use in Enterprise Systems,” paper presented at the Twenty Seventh International Conference on Information Systems, Milwaukee, 2006, .
