TY - JOUR AU - G. G. Magaril-Il'yaev TI - $\varphi$-mean diameters of classes of functions on the line JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1990 SP - 218 EP - 219 VL - 45 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1990_45_2_a10/ LA - en ID - RM_1990_45_2_a10 ER -