%0 Journal Article %A Z. I. Kizner %T Families of planes in Hilbert space and developable surfaces %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1971 %V 26 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1971_26_3_a11/ %G ru %F RM_1971_26_3_a11