Neutron scattering study of the proton dynamics in NH+4 and OH+3 β alumina J.C. Lassègues, M. Fouassier, N. Baffier, Ph. Colomban et A.J. Dianoux J. Phys. France, 41 3 (1980) 273-280 DOI: 10.1051/jphys:01980004103027300