%0 Journal Article
%A P. I. Lizorkin
%T On the approximation of functions on the sphere $\sigma$. On the
%J Doklady Akademii Nauk
%D 1993
%P 555-558
%V 331
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1993_331_5_a7/
%G ru
%F DAN_1993_331_5_a7