1. G. Centi, F. Cavani, F. Trifirò, Selective Oxidation by Heterogeneous Catalysis, Kluwer Academic Publishers, NY, 2001.
2. B.K. Hodnett, Heterogeneous Catalytic Oxidation, Wiley, Chichester, 2000.
3. C.T.J. Wreesmann, A.G. Talma, W.C. Endstra, US Patent 5,292,815 (1994).
4. R.M. D’Sidocky, L.G. Wideman, US Patent 5,696,188 (1997).
5. G.F. D’Alelio, US Patent 2,825,716 (1958).