%0 Journal Article %A V. T. Shevaldin %T Lower bounds on widths of classes of sourcewise representable functions %J Informatics and Automation %D 1989 %P 185-200 %V 189 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1989_189_a9/ %G ru %F TRSPY_1989_189_a9