%0 Journal Article %A B. N. Petrov %A R. A. Nelepin %A B. M. Shamrikov %T Construction of separatrix surfaces and stability regions in the phase spaces of nonlinear systems %J Doklady Akademii Nauk %D 1970 %P 530-532 %V 191 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_191_3_a7/ %G ru %F DAN_1970_191_3_a7