Metcalf S W. The Tort Hall air emission study[C/OL] //The International Congress on Hazardous Waste, Atlanta Marriott Marquis Hotel, Atlanta, Georgia, June 5-8, 1995: impact on human and ecological health [1998,09,22]. http://atsdrl.atsdr.cdc.gov:8080/cong95.html.
Turcotte D L. Fractals and chaos in geology and geophysics[M/OL]. Mew York: Cambridge University Press, 1992[1998,09,23]. http://www.seg.org/reviews/mccorm30.html.
