1. LXXXII.Bubbles and drops and Stokes' law
2. Schwartz , A. M. , and Perry , J. W. “Surface-Active Agents,” Inter-science Pub. , New York , 1949 , p. 345 .
3. Becker , Paul , “Emulsions: Theory and Practice,” Reinhold Pub. Corp. , New York , 1957 , pp. 189 – 196 .