%0 Journal Article %A B. L. Rozhdestvenskii %T A system of quasi-linear equations in the theory of surfaces %J Doklady Akademii Nauk %D 1962 %P 50-52 %V 143 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1962_143_1_a12/ %G ru %F DAN_1962_143_1_a12