TY - JOUR AU - S. L. Krushkal' TI - Differential operators and univalent functions JO - Doklady Akademii Nauk PY - 1985 SP - 541 EP - 544 VL - 280 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1985_280_3_a5/ LA - ru ID - DAN_1985_280_3_a5 ER -