%0 Journal Article %A M. V. Fedoryuk %T Analytic properties of the scattering amplitude in the one-dimensional case. I %J Differencialʹnye uravneniâ %D 1968 %P 1842-1853 %V 4 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1968_4_10_a8/ %G ru %F DE_1968_4_10_a8