1. Infrastructure: America’s Third Deficit
2. Benjamin J. R. and Cornell C. A. (1970). Probability statistics and decision for civil engineers 2nd Ed. McGraw-Hill New York N.Y.
3. Brealey R. A. and Myers S. C. (1991). Principles of corporate finance 4th Ed. McGraw-Hill New York N.Y.
4. Copeland T. E. and Weston J. F. (1988). Financial theory and corporate policy . Addison-Wesley Publishing Co. Reading Mass.
5. Dias A. (1994). “A managerial and financial study on the involvement of private-sector companies in the development construction operation and ownership of infrastructure projects ” PhD thesis Dept. of Civ. and Envir. Engrg. Univ. of Michigan Ann Arbor Mich.