1. A.M. Gaffney and H.P. Withers, WO 85/04866, assigned to Atlantic Richfield Company (1985).
2. J.H. Kolts and J.B. Kimble, EP 0,206,044, assigned to Phillips Petroleum Company (1986).
3. R.F. Hicks, U.S. Patent 4,780,449, assigned to W.R. Grace & Company, (1988).
4. C. Cameron, H. Mimoun, S. Bonnaudel and A Robine, U.S. Patent 4,929,787, assigned to Institut Francais du Petrole (1990).
5. Active and selective catalysts for the synthesis of C2H4 and C2H6 via oxidative coupling of methane