Neutron scattering study of the reorientational motions for NH3 groups in (NH3(CH2)3NH3)MnCl 4 C. Sourisseau, G. Lucazeau et A.J. Dianoux J. Phys. France, 44 8 (1983) 967-974 DOI: 10.1051/jphys:01983004408096700