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2. Andrews S.A. (1993) Organic by-product formation from the ozonation and chlorination of aquatic natural organic matter. Ph.D. Thesis, University of Alberta, Edmonton, AB, Canada.
3. Using fractionated natural organic matter to quantitate organic byproducts of ozonation;Andrews S;Ozone Sci. Engng.,1994
4. APHA, AWWA and WEF (1995). Greenberg A. E., Clesceri, L. S., Eaton, A. D. Standard Methods for the Examination of Water and Wastewater, 19th ed., American Public Health Association, Washington.
5. Atlas R. M. and Bartha R. (1993) Microbial Ecology, Fundamentals and Applications, 3rd ed. pp. 196–198, Benjamin/Cummings Redwood City, CA.