%0 Journal Article %A V. N. Sazonov %A V. Yu. Finkelshtein %T Tunnelling in the energy space as a mechanism of nonlinear oscillator swinging by an external harmonic force %J Doklady Akademii Nauk %D 1976 %P 78-81 %V 231 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_231_1_a19/ %G ru %F DAN_1976_231_1_a19