1. P. Becher, in“Nonionic Surfactants”, M.J. Schick, Editor, Chap. 15, Marcel Dekker, New York, 1967.
2. B.W. Barry and D.I.D. El Eini, J. Colloid Interface Sci. 54, 339 (1976).
3. D.I.D. El Eini, B.W. Barry and C.T. Rhodes, J. Colloid Interface Sci., 54, 348 (1976).
4. N. Nishikido, Y. Moroi, H. Uehara and R. Matuura, Bull. Chem. Soc. Japan, 47, 2634 (1974).
5. B. Weibull, in“Proc. of The Third International Congress on Surface Active Compounds”, Butterworths, London, p. 121, 1960.