Large amplitudes and (critical) slowing-down of the order parameter fluctuations near the second-order tetragonal-to-orthorhombic phase transformation in YBa2Cu3OxF. Brenscheidt, K. Foos and H. WipfEurophys. Lett., 39 3 (1997) 275-280DOI: https://doi.org/10.1209/epl/i1997-00347-0