1. Vögtle, F., Weber, E. (eds.): Host Guest Complex Chemistry I–III, Top. Curr. Chem. 98, 101, 121, Springer-Verlag, Berlin, Heidelberg, New York, 1981, 1982, 1984
2. Morf, W. E., Simon, W.: Helv. Chim. Acta 54, 794 (1971)
3. Morf, W. E., Simon, W.: ibid 54, 2683 (1971)
4. Simon, W., Morf, W. E., Meier, P. Ch.: Struct. Bonding (Berlin) 16, 114 (1973)
5. Pretsch, E., Ammann, D., Simon, W.: Res. Development 25, 20 (1974)