1. H. F�rster, R. Seelemann,J. C. S., Faraday 1 1978,74, 1435.
2. H. F�rster, R. Seelemann,J. C. S., Faraday 1 1979,75, 2744.
3. H. F�rster, M. Schumann,Heterogeneous Catalysis, Proc. Sixth Int. Symp., Sofia, 1987, Vol. 2 (D. Shopov et al., eds.), Bulg. Acad. Sci., Sofia, 1987, p. 170.
4. H. B�se, H. F�rster,Mikrochim. Acta [Wien] 1988,II, 19.
5. O. Zakharieva-Pencheva, H. B�se, H. F�rster, W. Frede, M. Grodzicki,J. Mol. Struct. 1985,122, 101.