1. S. D. Zdonik, E. J. Green and L. P. Hallee, Manufacturing ethylene, reprinted from Oil and Gas Journal, 66, 67, 68, 69, 70. The Petroleum Publishing Cy, Tulsa, Oklahoma, USA.
2. Commercial brochures of catalyst manufacturers. UCI (United Catalyst Incorporated, USA); ICI (Imperial Chemical Industries, U. K.); Girdler Südchemie (Fed. Rep. of Germany); Leuna-Werke (Democratic Rep. of Germany); Procatalyse (France).
3. J. C. Jungers, Cinétique Chimique Appliquée, Technip, Paris 1958, pp. 172–181.