1. Seinfeld, J.H.; Pandis, S.N. In Atmospheric Chemistry and Physics: From Air Pollution to Global Change; Wiley and Sons: New York, 1998; pp 49-120.
2. Wolff, G.T.; Groblicki, P.J.; Cadle, S.H.; Countess, R.J. In Particulate Carbon: Atmospheric Life Cycle; Wolff, G.T.; Klimisch, R.L., Eds; Plenum: New York, 1983; pp 317-324.
3. Air Quality Criteria for PM; EPA/600/P-65/001; U.S. Environmental Protection Agency: Washington, DC, 1996.
4. Gray, H.A. Ph.D. Thesis, California Institute of Technology, 1986.
5. Highway Statistics Report; Pennsylvania State Department of Transportation: Harrisburg, PA, 1998.