TY  - JOUR
AU  - Berman, Gerald
TI  - The Dichromate and Orientations of a Graph
JO  - Canadian journal of mathematics
PY  - 1977
SP  - 947
EP  - 956
VL  - 29
IS  - 5
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-095-1/
DO  - 10.4153/CJM-1977-095-1
ID  - 10_4153_CJM_1977_095_1
ER  -