%0 Journal Article %A A. N. Erugin %T Analytic structure of the solution of the equation $(2.5)$ %J Differencialʹnye uravneniâ %D 1965 %P 896-902 %V 1 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1965_1_7_a3/ %G ru %F DE_1965_1_7_a3