%0 Journal Article %A V. T. Fomenko %T Classification of Two-Dimensional Surfaces with Zero Normal Torsion in Four-Dimensional Spaces of Constant Curvature %J Matematičeskie zametki %D 2004 %P 744-756 %V 75 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2004_75_5_a10/ %G ru %F MZM_2004_75_5_a10