%0 Journal Article
%A Elena E. Berdysheva
%A Maria A. Filatova
%T On the best approximation of the infinitesimal generator of a contraction semigroup in a Hilbert space
%J Ural mathematical journal
%D 2017
%P 40-45
%V 3
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/UMJ_2017_3_2_a5/
%G en
%F UMJ_2017_3_2_a5