A Structural Study of the Lyotropic Nematic Phase of Vanadium Pentoxide Gels P. Davidson, C. Bourgaux, L. Schoutteten, P. Sergot, C. Williams et J. Livage J. Phys. II France, 5 10 (1995) 1577-1596 DOI: 10.1051/jp2:1995200