An improved directional growth apparatus for liquid crystals: applications to thermotropic and lyotropic systems P. Oswald, M. Moulin, P. Metz, J. C. Géminard, P. Sotta et L. Sallen J. Phys. III France, 3 9 (1993) 1891-1907 DOI: 10.1051/jp3:1993248