%0 Journal Article %A R. I. Bogdanov %T Multiplicative Theory of Orbital Equivalence of Vector Fields in the Plane %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1998 %P 101-126 %V 221 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1998_221_a5/ %G ru %F TM_1998_221_a5