%0 Journal Article %A V. P. Nozdracheva %T Successor functions in the neighborhood of a singular cycle %J Differencialʹnye uravneniâ %D 1979 %P 405-407 %V 15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_3_a3/ %G ru %F DE_1979_15_3_a3