Spin-waves in the mid-infrared spectrum of antiferromagnetic YBa2Cu3O6.0M. Grüninger, J. Münzel, A. Gaymann, A. Zibold, H. P. Geserich and T. KoppEurophys. Lett., 35 1 (1996) 55-60DOI: https://doi.org/10.1209/epl/i1996-00530-3
