TY - JOUR AU - I. S. Ovchinnikov TI - The nonexistence of mappings of class $BL^{n/2}$ of a ball onto a region JO - Doklady Akademii Nauk PY - 1968 SP - 24 EP - 27 VL - 179 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1968_179_1_a4/ LA - ru ID - DAN_1968_179_1_a4 ER -