%0 Journal Article %A Antonio Córdoba %A Diego Córdoba %A Marco A. Fontelos %T Formation of singularities for a transport equation with nonlocal velocity %J Annals of mathematics %D 2005 %P 1377-1389 %V 162 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2005.162.1377/ %R 10.4007/annals.2005.162.1377 %G en %F 10_4007_annals_2005_162_1377