%0 Journal Article
%A Tefteller, S.C.
%T A polar coordinate transformation for nonhomogeneous differential systems
%J Portugaliae mathematica
%D 1975
%P 219-223
%V 34
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1975__34_4_115267/
%G en
%F PORMA_1975__34_4_115267