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2. F.T. Eggerson, H.H. Vonge, US Patent 2,414,585 (1947).
3. E.W. Pitzer, US Patent 2,666,086 (1954).
4. K.K. Kearby, P.H. Emmett (Eds.), Catalysis, Vol. 3, Reinhold, New York, 1955, p. 480.
5. Dehydrogenation of ethylbenzene over potassium-promoted iron oxide containing cerium and molybdenum oxides