1. The Catalyst Group, The Intelligence Report, Global Shifts in Catalyst Industry, 2000.
2. G. Ertl, H. Knözinger, J. Weitkamp (Eds.), Preparation of Solid Catalysts, Wiley-VCH, Weinheim, 1999.
3. G. Poncelet, J. Martens, B. Delmon, P.A. Jacobs, P. Grange (Eds.), Preparation of Catalysts VI, Elsevier, Amsterdam, Stud. Surf. Sci. Catal. 91 (1995).
4. F. Cavani, F. Trifirò, in: G. Poncelet, J. Martens, B. Delmon, P.A. Jacobs, P. Grange (Eds.), Preparation of Catalysts VI, Elsevier, Amsterdam, Stud. Surf. Sci. Catal. 91 (1995) 1.
5. K. Weissermel, H.-J. Arpep, Industrielle Organische Chemie: Bedeutende Vor-und Zwischenprodukte, 4th Edition, VCH, Weinheim, 1994, p. 366.