%0 Journal Article %A G. I. Laptev %T Exponential solutions of the Cauchy problem with a constant operator %J Differencialʹnye uravneniâ %D 1971 %P 232-243 %V 7 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1971_7_2_a5/ %G ru %F DE_1971_7_2_a5