Uniaxial rotational diffusion in the smectic B phase of TBBA observed by quasi-elastic neutron scattering H. Hervet, F. Volino, A.J. Dianoux and R.E. Lechner J. Physique Lett., 35 9 (1974) 151-155 DOI: 10.1051/jphyslet:01974003509015100