%0 Journal Article
%A Tutte, W. T.
%T Combinatorial Oriented Maps
%J Canadian journal of mathematics
%D 1979
%P 986-1004
%V 31
%N 5
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-091-3/
%R 10.4153/CJM-1979-091-3
%F 10_4153_CJM_1979_091_3