%0 Journal Article %A G. S. Barkhin %A V. T. Fomenko %T On the single-valued determination of a piecewise regular surface of positive curvature with a boundary condition %J Doklady Akademii Nauk %D 1963 %P 1023-1026 %V 152 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_152_5_a0/ %G ru %F DAN_1963_152_5_a0