Critical slowing-down and central peak phenomena near TI, in Rb2ZnCl4 : Mn2+ through E.P.R. measurements A. Kaziba, M. Pezeril, J. Emery et J.C. Fayet J. Physique Lett., 46 8 (1985) 387-393 DOI: 10.1051/jphyslet:01985004608038700