%0 Journal Article %A A. V. Borisov %A A. A. Kilin %A I. S. Mamaev %T Reduction and chaotic behavior of point vortices on a plane and a sphere %J Russian journal of nonlinear dynamics %D 2005 %P 233-246 %V 1 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ND_2005_1_2_a5/ %G ru %F ND_2005_1_2_a5