%0 Journal Article %A S. B. Klimentov %T A priori estimates for the derivatives of the radius-vector of a~surface of positive curvature %J Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara %D 1987 %P 187-213 %V 19 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTG_1987_19_a5/ %G ru %F INTG_1987_19_a5