Proof of asymmetry in the Cd-arachidate bilayers of ultrathin Langmuir-Blodgett multilayer films via X-ray interferometry S. Xu, M. A. Murphy, S. M. Amador et J. K. Blasie J. Phys. I France, 1 8 (1991) 1131-1144 DOI: 10.1051/jp1:1991195