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2. Boucher, E.A., T.M. Grinchuk and A.C. Zettlemoyer, Ibid.:49 (1968).
3. Weil, J.K., and W.M. Linfield, Ibid.:319 (1977).
4. Schambil, F., and M.J. Schwuger,Tenside Surf. Detr. 27:380 (1990).
5. Okumura, O., T. Sakatani and I. Yamane,7th Comité International des Derives Tensio-Actis, Vol. 1, 225, Moscow, 1976.