1. G. Terborgh, Dynamic Equipment Policy, McGraw-Hill, New York, 1949.
2. R. McKinon. The Concept of Flexibility and Urban Systems, Center of Urban Studies, University of Illinois, 1978.
3. M.A. Fox, B.P. Yeh, Intelligent kinetic systems in architecture, in: Managing Interactions in Smart Environments (MANSE), Springer, London, 1999.
4. M. Amram, N. Kulatilaka, Real Options: Managing Strategic Investments in an Uncertain World, Harvard Business School Press, Boston, MA, 1999.
5. A. Raouf, M. Ben-Daya (Eds.), Flexible Manufacturing Systems: Recent Developments, Elsevier, Amsterdam, 1995.