Damping of the vortex motion in superconducting Mo3Si and YBa2Cu3O7-δ S. G. Doettinger, R. P. Huebener, S. Kittelberger and C. C. Tsuei Europhys. Lett., 33 8 (1996) 641-646 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00392-7