1. P. C. Carman, Trans. Instn. chem. Engrs. 15, 150 [1937]; 16, 168/188 [1938].
2. P. Kozeny, Wasserwirtschaft 2, 67 [1927].
3. T. H. Hughes, priv. Mitt., J. appl. Chem. (im Druck).
4. F. M. Lea u. R. W. Nurse: Instn. chem. Engrs. and Soc. Chem. Ind. Symposium on Particle Size Analysis. 1947, p. 36.
5. H. E. Rose, J. appl. Chem. 2, 217 [1952].