Liquid crystals complexed to copper (II) : an X-ray diffractometric study on monodomains of (DCBBA) 2 -Cu and (HOBBA)2-Cu A.M. Levelut, M. Ghedini, R. Bartolino, F.P. Nicoletta et F. Rustichelli J. Phys. France, 50 2 (1989) 113-119 DOI: 10.1051/jphys:01989005002011300