%0 Journal Article %A I. N. Vekua %T On a functional equation in the theory of minimal surfaces %J Doklady Akademii Nauk %D 1974 %P 997-1000 %V 217 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_217_5_a1/ %G ru %F DAN_1974_217_5_a1