Electro-Optical Properties of Ferroelectric Liquid Crystals with a Sulfinate Group as Unique Source of Chirality Mohammed Zoubair Cherkaoui, Jean-François Nicoud, Yves Galerne and Daniel Guillon J. Phys. II France, 5 9 (1995) 1263-1268 DOI: 10.1051/jp2:1995181