%0 Journal Article %A E. K. Kostousova %T On observability for the one-dimensional heat equation %J Differencialʹnye uravneniâ %D 1992 %P 543-545 %V 28 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1992_28_3_a30/ %G ru %F DE_1992_28_3_a30