TY - JOUR AU - A. V. Efimov TI - A version of the Turan problem for positive definite functions of several variables JO - Trudy Instituta matematiki i mehaniki PY - 2011 SP - 136 EP - 154 VL - 17 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TIMM_2011_17_3_a14/ LA - ru ID - TIMM_2011_17_3_a14 ER -