%0 Journal Article
%A B. V. Simonov
%A V. A. Ivanyuk
%A I. E. Simonova
%T Existence of best approximation elements in the spaces $L_{\varphi_+\varphi_-}$
%J Contemporary Mathematics and Its Applications
%D 2015
%P 112-131
%V 96
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMA_2015_96_a7/
%G ru
%F CMA_2015_96_a7