%0 Journal Article %A Yu. G. Borisovich %T On a certain problem of the calculus of variations in the large in Hilbert space %J Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki %D 1955 %P 117-138 %V 115 %N 14 %U http://geodesic.mathdoc.fr/item/UZKU_1955_115_14_a10/ %G ru %F UZKU_1955_115_14_a10