%0 Journal Article %A I. A. Bashkirtseva %A M. G. Isakova %A L. B. Ryashko %T Asymptotic expansion of the quasipotential for a stochastically perturbed nonlinear oscillator %J Differencialʹnye uravneniâ %D 1999 %P 1319-1324 %V 35 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1999_35_10_a2/ %G ru %F DE_1999_35_10_a2