%0 Journal Article %A N. A. Izobov %T The set of lower exponents of positive measure %J Differencialʹnye uravneniâ %D 1968 %P 1147-1149 %V 4 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1968_4_6_a19/ %G ru %F DE_1968_4_6_a19