TY - JOUR AU - S. Ya. Havinson TI - Golubev sums: a theory of extremal problems like the analytic capacity problem and of related approximation processes JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1999 SP - 753 EP - 818 VL - 54 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1999_54_4_a2/ LA - en ID - RM_1999_54_4_a2 ER -