1. A Guide to the Project Management Body of Knowledge,1996
2. Real Options: Managerial Flexibility and Strategy in Resource Allocation;Trigeorgis,1996
3. Expectation in Economics;Shackle,1952
4. The magical number seven, plus or minus two: some limits on our capacity for processing information;Miller;The Pychological Review,1956
5. Risk, Uncertainty and Profit;Knight,1921