NUCLEAR MAGNETIC RELAXATION AND SELF DIFFUSION IN SOME LIQUID CRYSTALS SHOWING SMECTIC POLYMORPHISM G. J. KRÜGER, H. SPIESECKE et R. VAN STEENWINKEL J. Phys. Colloques, 37 C3 (1976) C3-123-C3-126 DOI: 10.1051/jphyscol:1976322