%0 Journal Article %A V. I. Arnol'd %T The stability of the equilibrium position of a Hamiltonian system of ordinary differential equations in the general elliptic case %J Doklady Akademii Nauk %D 1961 %P 255-257 %V 137 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_137_2_a0/ %G ru %F DAN_1961_137_2_a0