Depinning of a vortex chain in a disordered flow channel R. Besseling, T. Dröse, V. M. Vinokur and P. H. Kes Europhys. Lett., 62 3 (2003) 419-425 Published online: 01 April 2003 DOI: 10.1209/epl/i2003-00412-2