%0 Journal Article %A V. F. Byzov %A V. A. Zavsegdashnii %T Investigation of questions of approximation of convex surfaces by bilinear splines %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 75-76 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1987_180_a37/ %G ru %F TM_1987_180_a37