1. Clayton: U. S. Patent No. 2,100,274.
2. Fash: U. S. Patent Nos. 2,341,536–2,342,042.
3. Theory of Emulsions by W. Clayton, p. 225, 3rd ed. P. Blakiston’s Son & Co.
4. Diffusion: J.I.E.C., vol. 33, pp. 423–501.
5. Chisholm: U. S. Patent No. 1,007,642.