LIQUID CRYSTALS WITH HYDROAROMATIC AND HYDROHETEROCYCLIC STRUCTURES H. SCHUBERT, W. SCHULZE, H.-J. DEUTSCHER, V. UHLIG and R. KUPPE J. Phys. Colloques, 36 C1 (1975) C1-379-C1-386 DOI: 10.1051/jphyscol:1975162