%0 Journal Article
%A A. A. Koshelev
%T The best $L_p$ approximation of the Laplace operator by linear bounded operators in the classes of functions of two and three variables
%J Trudy Instituta matematiki i mehaniki
%D 2011
%P 217-224
%V 17
%N 3
%U http://geodesic.mathdoc.fr/item/TIMM_2011_17_3_a20/
%G ru
%F TIMM_2011_17_3_a20