%0 Journal Article
%A Gião, António
%T Field equations of any differentiable variety
%J Portugaliae mathematica
%D 1958
%P 63-83
%V 17
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1958__17_2_114802/
%G en
%F PORMA_1958__17_2_114802