New investigation on the tetragonal liquid-crystalline phase or SmQ B. Pansu, Y. Nastishin, M. Impéror-Clerc, M. Veber and H. T. Nguyen Eur. Phys. J. E, 15 2 (2004) 225-230 Published online: 10 November 2004 DOI: 10.1140/epje/i2004-10051-y