2Mandelbaum. Flexibility and Decision Making [ J ]. European Journal of Operational Research, 1978(44) : 17 - 27.
3Antonio S. Mello, John E. Parsonsd, Alexander J. Triantis . An integrated model of multinational flexibility and financial hedging [ J ]. Journal of International Economics, 1995 (39): 27-51.
4Christian Rammela, Jeroen C. J. M. van den Berghb.Evolutionary policies for sustainable development: adaptive flexibility and risk minimizing [ J]. Ecological Economics, 2003 (47) : 121 - 133.
5Dreyer, B. and K. Gornhaug. Uncertainty, flexibility, and sustained competitive advantage [ J ]. Journal of Business Research, 2004, 57 (5) :484 - 494.
6Kreiner K. In search of relevance: project management in drifting environments [ J 1- Scand J Manage 1995 ; 11 (4) :335 -46.
7Nils O. E. Olsson . Management of flexibility in projects [ J ] . International Journal of Project management, 2006 (24) :66-74.
