6Philippe Aghion, Patrick Bohon. An in complete contracts approach to financial contracting[ J]. Review of Economic studies, 1992, 59: 473-494.
7Trigeorgis L. Real options: Managerial flexibility and strategy in resource allocation[ M]. Cambridge and London. MIT Press, 1996.
8Shehabuddeen N, Probert D, Phaal R. From theory to practice:challenges in operationalising a technology selection framework [J]. Teehnovation, 2006, 26(3): 324 - 335.
9Schwartz, Eduardo S, Moon Mark. Rational Pricing of Internet Companies[J]. Financial Analysts Journal, 2000, (5) : 62-76.
10Yong Li. Duration analysis of venture capital staging: A real options perspective [ J]. Journal of Business Venturing ,2008, 23 : 497-512.