SYNTHESIS AND DIELECTRIC PROPERTIES OF LIQUID CRYSTALS CONTAINING TWO CYANO GROUPS L. A. KARAMYSHEVA, S. I. TORGOVA, E. I. KOVSHEV and M. I. BARNIK J. Phys. Colloques, 40 C3 (1979) C3-37-C3-40 DOI: 10.1051/jphyscol:1979309