1. Tchobanoglous, G., and Burton, F.L. (2003). Wastewater engineering-treatment, disposal, reuse, 4th Ed., Metcalf and Eddy, McGraw-Hill, Inc., New York.
2. Lynn, W.R., Logan, J.A., and Charnes, A. (1962). “System analysis for planning wastewater treatment plants.” J. of Water Pollution Control Federation, 34, 565-581.
3. Chia, S.S., and Defilippi, J.A. (1970). “System optimization of waste treatment plant process design.” J. of Environmental Engineering Division, 96, 409-421.
4. Evenson, D.E., Orlob, G.T., and Monser, J.R. (1969). “Preliminary selection of waste treatment systems.” J. of Water Pollution Control Federation, 41, 1845-1858.
5. Rossman, L.A. (1980). “Synthesis of waste treatment systems by implicit Enumeration.” J. of Water Pollution Control Federation, 52, 148-160.
6.Dick, R.I. (1984). “Integration of sludge management processes.” Proceedings of the International Symposium on Wastewater Engineering and Management Society of Environmental Science of Guangdong, Guangzhou, People’s Republic of China.
7. Guangming, Z., Ru, J., Guohe, H., Min, X., and Jianbing, L. (2007). “Optimization of wastewater treatment alternative selection by hierarchy grey relational analysis.” J. of Environmental Management, 82, 250-259.
8.Asgharpour, M.J. (1998). Multi attribute decision making, Tehran University Pub., Tehran. (In Persian)
9.Anagnostopoulos, K.P., Gratziou, M., and Vavatsikos, A.P. (2007). “Using the fuzzy analytic hierarhy Process for selecting wastewater facilities at prefecture level.” J. of European Water, 19/20, 15-24.
10. Dabbaghian, M.R., Hashemi, S.H., and Ebadi, T. (2009). “Technical, economical and environmental evaluation of plating industrial wastewater treatement method susing AHP.” J. of Environmental Sciences and Tech., 11 (3), 107-115. (In Persian)
11. Karimi, A.R., Mehrdadi, N., Hashemian, S.J., Nabi Bidhendi, Gh. R., and Tavakkoli Moghaddam, R. (2010). “Using AHP for selection the best wastewater treatment process.” J. of Water and Wastewater, 76, 2-12. (In Persian)
12. Saaty, T.L. (2000). Fundamentals of decision making and priority theory, 2nd Ed., PA: RWS Pub., Pittsburgh.
13. Ghodsipour, H. (2002). Topics in multi attribute decision making, 3rd Ed., Amir Kabir University Pub., Tehran. (In Persian)
14. Saaty, T.L. (1980). The analytical hierarchy process, McGraw-Hill, New York.
15. Mehregan, M.R. (2004). Advanced operations research, Ketabe Daneshgahi, Pub., Tehran. (In Persian)