%0 Journal Article %A S. Yu. Pilyugin %T Chain prolongations in typical dynamical systems %J Differencialʹnye uravneniâ %D 1990 %P 1334-1337 %V 26 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_8_a5/ %G ru %F DE_1990_26_8_a5