%0 Journal Article
%A Antoni Smoluk
%T Invariant approximations
%J Mathematica Applicanda
%D 1981
%P  17-22
%V 9
%N 17
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.14708/ma.v9i17.1512/
%R 10.14708/ma.v9i17.1512
%G pl
%F 10_14708_ma_v9i17_1512