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2. A.F. Millidge, in: S.A. Miller (Ed.), Ethylene and its Industrial Derivatives, Ernest Benn Ltd., London, 1969, p. 713
3. Supportsd Liquid-Phass Catalysts
4. G.M. Wells, Handbook of Petrochemicals and Processes, Gower Publishing, Hants, 1991, p. 154
5. K. Tanabe, M. Misono, Y. Ono, H. Hattori, New Solid Acids and Bases, Elsevier, Amsterdam, 1989, p. 248