The unclassified smectic phase of N-(4-n-pentyloxybenzylidene)-4-n-hexylaniline (50.6) J.W. Goodby, G.W. Gray, A.J. Leadbetter et M.A. Mazid J. Phys. France, 41 6 (1980) 591-595 DOI: 10.1051/jphys:01980004106059100