1. R. S. Kaplan and G. W. P. Rengstorff: Proc. 2nd C. C. Furnas Memorial Conference, Buffalo, NY, November 1971, J. Szekely, ed., Marcel Dekker, Inc., New York, NY, 1973, p. 171.
2. R. Jablin:J. of Air Poll. Control Assoc., 1972, vol. 22, p. 191.
3. F. H. Rehmus, D. P. Manka, and E. A. Upton:J. of Air Poll. Control Assoc., 1973, vol. 23, p. 864.
4. R. F. Potocic and K. G. Lewis: McMaster University, Hamilton, Ontario, unpublished research, 1975.
5. E. T. Turkdogan and M. L. Pearce:Trans. TMS-AIME, 1963, vol. 227, p. 940.