TY - JOUR AU - A. Yanushauskas TI - On the problem of the oblique derivative JO - Doklady Akademii Nauk PY - 1965 SP - 753 EP - 756 VL - 164 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1965_164_4_a8/ LA - ru ID - DAN_1965_164_4_a8 ER -