TY - JOUR AU - I. V. Petrova TI - Approximation on a~hyperboloid in the $L_2$-metric JO - Informatics and Automation PY - 1992 SP - 215 EP - 228 VL - 194 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1992_194_a13/ LA - ru ID - TRSPY_1992_194_a13 ER -