%0 Journal Article %A Zh. B. Linkovskii %T An analogue of Duamel's integral in the case of preliminarily excited linear filtres with variable parameters %J Doklady Akademii Nauk %D 1964 %P 1324-1326 %V 158 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_158_6_a20/ %G ru %F DAN_1964_158_6_a20