1. Alkali Doping in Heterogeneous Catalysis
2. P. Stolze, in: A. Nielsen (Ed.), Ammonia Catalysis and Manufacture, Springer, Berlin, 1995 (Chapter 2) (and references therein).
3. M. Bowker, in: D.A. King, D.P. Woodruff (Eds.), The Chemical Physics of Solid Surfaces, vol. 6, Elsevier, Amsterdam, 1993 (Chapter 7).
4. R. Schlögl, in: J.R. Jennings (Ed.), Catalytic Ammonia Synthesis, Plenum Press, New York, 1991 (Chapter 2).
5. R. Schlögl, in: G. Ertl, H. Knözinger, J. Weitkamp (Eds.), Handbook of Heterogeneous Catalysis, vol. 4, VCH, Weinheim, 1997 (Chapter 2.1).