%0 Journal Article %A N. A. Izobov %T The minimal exponent of a two-dimensional diagonal system %J Differencialʹnye uravneniâ %D 1976 %P 1954-1966 %V 12 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_11_a4/ %G ru %F DE_1976_12_11_a4