%0 Journal Article %A Yu. T. Lisitsa %T On the exactness of the spectral homotopy group sequence in shape theory %J Doklady Akademii Nauk %D 1977 %P 23-26 %V 236 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1977_236_1_a4/ %G ru %F DAN_1977_236_1_a4