1. Kling, W., and H. Lange, “Second International Congress of Surface Activity, 1957,” Butter Worths Scientific Publications, London, England, p. 295.
2. Danielson, I., Acta Acad. Aboensis Math. Phys. 20:7 (1956).
3. Elworthy, P.H., J. Pharm. Pharmcol. 11:557 (1959).
4. Elworthy, P.H., Ibid. 11:624 (1959).
5. Ueno, M., T. Hikota, T. Mitamura, and K. Meguro, JAOCS 49:250 (1972).