%0 Journal Article %A V. I. Arnol'd %T Small denominators and problems of stability of motion in classical and celestial mechanics %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1963 %P 85-191 %V 18 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1963_18_6_a1/ %G en %F RM_1963_18_6_a1