%0 Journal Article
%A G. I. Laptev
%T On the theory of the operational calculus of linear unbounded operators
%J Doklady Akademii Nauk
%D 1969
%P 760-763
%V 185
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_185_4_a7/
%G ru
%F DAN_1969_185_4_a7