1. SE Manahan. Fundamentals of Environmental Chemistry, 2nd ed.Boca Raton, FL: Lewis Publishers, 2001, pp.554-562.
2. B Gugele and M Ritter. Annual European Community CLRTAP Emission Inventory 2000, Technical Report 91, European Environment Agency, 2000, p. 28.
3. N deNevers. Air Pollution Control Engineering. New York: McGraw-Hill, 1995, pp.378-394.