%0 Journal Article
%A Franco de Oliveira, A.J.
%T Remark on a theory of classes used by A. Machado
%J Portugaliae mathematica
%D 1980
%P 295-297
%V 39
%N 1-4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1980__39_1-4_115421/
%G en
%F PORMA_1980__39_1-4_115421