TY - JOUR AU - V. P. Motornyi AU - V. I. Ruban TI - Diameters of some classes of differentiable periodic functions in the space $L$ JO - Matematičeskie zametki PY - 1975 SP - 531 EP - 543 VL - 17 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1975_17_4_a4/ LA - ru ID - MZM_1975_17_4_a4 ER -