1. See for instance:
2. aAngelici, R. J.InEncyclopedia of Inorganic Chemistry;King, R. B, Ed.John Wiley & Sons:New York, 1994; p1433.
3. bPrins, RInHandbook of Heterogeneous Catalysis,2nded.Ertl, G, Knözinger, H, Schüt, F., and Weitkamp, J., Eds.Wiley-VCH:Weinheim, 2008; Vol.6, p2695.
4. Hydrotreating Catalysis