%0 Journal Article %A V. A. Ditkin %T Operational calculations for functions defined on the entire straight line %J Doklady Akademii Nauk %D 1957 %P 191-194 %V 112 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1957_112_2_a2/ %G ru %F DAN_1957_112_2_a2