%0 Journal Article
%A A. H. Turetzkii
%T A class of functions for which a given summation method yields the best order approximation. III
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1969
%P 80-87
%N 6
%U http://geodesic.mathdoc.fr/item/IVM_1969_6_a10/
%G ru
%F IVM_1969_6_a10