%0 Journal Article %A I. M. Sigal %A F. Ting %T Pinning of magnetic vortices by an external potential %J Algebra i analiz %D 2004 %P 239-268 %V 16 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_2004_16_1_a7/ %G en %F AA_2004_16_1_a7