1. W. Mih and J. D. Parker,Tappi J.,50, 237 (1967).
2. P. F. W. Lee and G. G. Duffy,Appita,30, 219 (1976).
3. M. Steen,Nordic Pulp Paper Res. J.,4, 244 (1989).
4. J. S. Olson, Ph.D. Dissertation, University of British Columbia, 1996.
5. S. Dong, X. Feng, M. Salcudean, and I. Gartshore,Int. J. Multiphase Flow,29, 1 (2003).