Longitudinal spin fluctuations in the antiferromagnet studied by polarized neutron scatteringW. Schweika, S. V. Maleyev, Th. Brückel, V. P. Plakhty and L.-P. RegnaultEurophys. Lett., 60 3 (2002) 446-452DOI: https://doi.org/10.1209/epl/i2002-00284-x