%0 Journal Article %A V. P. Ruzaev %T On the bifurcation of an invariant torus $\mathbf T^m\to\mathbf T^{m+1}$ %J Differencialʹnye uravneniâ %D 1989 %P 1066-1069 %V 25 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1989_25_6_a29/ %G ru %F DE_1989_25_6_a29