%0 Journal Article %A F. Kh. Tselman %T ``Resonance'' in small oscillations of the spherical pendulum %J Doklady Akademii Nauk %D 1972 %P 553-554 %V 202 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1972_202_3_a15/ %G ru %F DAN_1972_202_3_a15