%0 Journal Article
%A Halldén, S.
%T A reduction of the primitive symbols of the Lewis calculi
%J Portugaliae mathematica
%D 1949
%P 85-88
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1949__8_2_114675/
%G en
%F PORMA_1949__8_2_114675