1. Covello, V. T. and M. W. Merkhofer, (1993) Risk Assessment Methods: Approaches for Assessing Health and Envronmental Risks, Plenum Press, New York.
2. Crawford-Brown, D. J. (1997) Theoretical and Mathematical Foundations of Human Health Risk Analysis, Kluwer Academic Publishers, Dordrecht.
3. Daellenbach, H. G., (1994) Systems and Decision Making, John Wiley & Sons ltd., England.
4. Davies, J. C, (1986) “A Multimedia Approach to Pollution Control: Cross-Media Problems,” in Y. Cohen, ed., Pollutants in a Multimedia Environment, Plenum Press, New York.
5. EPA (1989) Regulatory Impact Analysis of the Proposed Regulations for Sewage Sludge Use and Disposal, Washington, D.C.