%0 Journal Article
%A A. P. Terekhin
%T A multiparameter semigroup of operators, mixed moduli and aproximation
%J Izvestiya. Mathematics 
%D 1975
%P 887-910
%V 9
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1975_9_4_a10/
%G en
%F IM2_1975_9_4_a10