1. Kaye, B.H.: Direct Characterization of Fine Particles. Wiley, New York (1981)
2. CEMA: Classification and Definition of Bulk Materials, Book No. 550. Washington, DC (1970)
3. Boothroyd, R.G.: Flowing Gas Solids Suspensions. Chapman & Hall, London (1971)
4. Tchen, C.M.: Ph.D. Thesis, Delft, Martinus Nijhoff, The Hague (1947)
5. Corrosin, S., Lumley, J.: Appl. Sci. Res. 6A, 114 (1956)