6[1]Klammer,T, "Empirical Evidence of the Adoption of Sophisticated Capital Budgeting Techniques", The Journal of Business,July 1972.
7[2]Eugene F. Brigham and Louis C. Gapenski. Intermediate Financial Management, Dryden, 1988
8[3]L. R. Runyon. "Capital Expenditure Decision Making in Small Firms, "Journal of BusinessResearch. September. 1983.
9[4]R. Charles Moyer, James R. McGuigan, William J Kretlow: Contemporary Financial Management, 7 - th ED. South - Western College Publishing,an ITP Co, 1998
