NMR evidence of anomalous molecular diffusion due to structural confinement M. Appel, G. Fleischer, J. Kärger, F. Fujara and S. Siegel Europhys. Lett., 34 7 (1996) 483-488 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00483-y