Superconductivity in the tungsten bronze RbxWO3 (0.20⩽x⩽0.33) in connection with its structure, electronic density of states, and phonon density of statesRemoveR. Brusetti, P. Bordet, J. Bossy, H. Schober, and S. EiblPhys. Rev. B 76, 174511 (2007)