@article{TM_1987_180_a37,
     author = {V. F. Byzov and V. A. Zavsegdashnii},
     title = {Investigation of questions of approximation of convex surfaces by bilinear splines},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {75--76},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1987_180_a37/}
}