%0 Journal Article
%A Schaefer, Paul
%T Mappings of positive integers and subspaces of m
%J Portugaliae mathematica
%D 1979
%P 27-38
%V 38
%N 1-2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1979__38_1-2_115366/
%G en
%F PORMA_1979__38_1-2_115366