%0 Journal Article %A B. A. Khesin %T Homogeneous vector fields and Whitney umbrellas %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 171-172 %V 42 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1987_42_5_a11/ %G en %F RM_1987_42_5_a11