%0 Journal Article %A R. L. Frum-Ketkov %T The behaviour of cycles not homologous to zero when a $n$-dimensional manifold is mapped into %J Doklady Akademii Nauk %D 1958 %P 42-44 %V 118 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_118_1_a10/ %G ru %F DAN_1958_118_1_a10