1. J. Haber,The Role of Molybdenum in Catalysis (Climax Molybdenum Co Ltd, London, 1981).
2. R.K. Grasselli, J.F. Brazdil and J.D. Burrington, in:Proc 8th Intern. Congr. on Catal., Vol. V (Verlag Chemie, Weinheim, 1984) pp. 369?380.
3. R.K. Grasselli and J.D. Burrington, in:Advances in Catalysis, eds. D.D. Eley, H. Pines and P.B. Weisz, Vol. 30 (Academic Press, New York, 1981) pp. 133?163.
4. B. Grzybowska, J. Haber and J. Janas, J. Catal. 49 (1977) 150.
5. J.C. Volta, M. Forissier, F. Theobald and T.P. Pham, Faraday Discuss. Chem. Soc. 72 (1981) 225.