%0 Journal Article %A R. A. Prokhorova %T Certain properties of the smaller exponent when there are Perron perturbations %J Differencialʹnye uravneniâ %D 1975 %P 997-1004 %V 11 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_6_a4/ %G ru %F DE_1975_11_6_a4