Critical slowing down near the smectic-A-hexatic-B transition R. Geer, H.Y. Liu, E.K. Hobbie, G. Nounesis, C.C. Huang et J.W. Goodby J. Phys. France, 50 20 (1989) 3167-3172 DOI: 10.1051/jphys:0198900500200316700