TY - JOUR AU - P. V. Semenov TI - Convex sections of graphs of continuous functions JO - Matematičeskie zametki PY - 1991 SP - 75 EP - 80 VL - 50 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1991_50_5_a10/ LA - ru ID - MZM_1991_50_5_a10 ER -