10
Nye, J. (2013, January 21). Billionaire Warren Buffett still lives in modest Omaha home he bought for $31,500 in 1958, The Daily Mail.
11
Waldman, S. (1992, January 27). The tyranny of choice: Why the consumerrevolution is ruining your life, The New Republic, p. 22–25.
12
Trout, J. (2005, December 5). Differentiate or die, Forbes.
13
Knolmayer, G. F., Mertens, P., Zeier, A., & Dickersbach, J. T. (2009). Supplychain management case studies. Supply Chain Management Based on SAP Systems: Architecture and Planning Processes, 161–188.
