1. A. M. Schwartz, in Surface and Colloid Science (E. Matijevic, ed.), Vol. 5, p. 195ff, John Wiley and Sons, New York (1972).
2. A. M. Schwartz, in Encyclopedia of Chemical Technology (R. E. Kirk and D. F. Othmer, eds.) (2nd ed.), Vol. 6, p. 853, Interscience, New York (1965).
3. F. H. Rhodes and S. W. Brainerd, Ind. Eng. Chem. 21, 60 (1929).
4. W. Spring, Kolloid Z. 4, 161 (1909); 6, 11, 109, 164 (1910).
5. ASTM Standard D2960–76. ASTM1976Book of Standards, p. 437, ASTM, Philadelphia (1976).