%0 Journal Article
%A Antoni Smoluk
%T Invariant approximations
%J Mathematica Applicanda
%D 1981
%V 9
%N 17
%I mathdoc
%U https://geodesic-test.mathdoc.fr/item/MA_1981__9_17_292978/
%G en
%F MA_1981__9_17_292978