Structural study of the charge-density-wave phase transition of the blue bronze : K0.3MoO3 J.P. Pouget, C. Noguera, A.H. Moudden et R. Moret J. Phys. France, 46 10 (1985) 1731-1742 DOI: 10.1051/jphys:0198500460100173100