TY - JOUR AU - N. A. Davydov TI - On the exactness of a theorem of Mazur and Orlicz JO - Matematičeskie zametki PY - 1972 SP - 431 EP - 436 VL - 11 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1972_11_4_a9/ LA - ru ID - MZM_1972_11_4_a9 ER -