1. Cloud modifications by urban pollution: a physical demonstration;Barret;Met Res,1979
2. Benes I, Muller J, Lenicek J, Pochmanova D, Novak J, Stevens RK. Air pollution as measured in Teplice, northern Bohemia, in the years 1972–1995. Clean air congress, Helsinki, Finland, May 28–June 3, 1995.
3. Bjorseth A, editor. Handbook of polycyclic aromatic hydrocarbons. New York: Marcel Dekker, 1983.
4. Bowen HJM. Environmental chemistry of the elements. London: Academic Press, 1979.
5. Composition and sources of atmospheric particulate matter at Kayseri, central Turkey;Kartal;Sci Total Environ,1993