1. R. M. Barrer, Adv. Chem. Ser.,102, 37 (1971).
2. H. Pfeifer, NMR Basic Principles and Progress, Vol. 7, Springer-Verlag, Berlin (1972), p. 53.
3. J. Kärger and D. M. Ruthven, J. Chem. Soc., Faraday Trans. 1,77, 1485 (1981).
4. M. Bülow, J. Kärger, M. Kocirik, and A. M. Volo??uk, Z. Chem.,21, 175 (1981).
5. M. Bülow, A. M. Voloshchuk, J. Kärger, and V. I. Ulin, Expanded Proceedings of the V All-Union Conference on Theoretical Problems of Adsorption [in Russian], No. 2, Nauka, Moscow (1979), p. 33.