TY  - JOUR
AU  - Fawcett, Barry
TI  - A Canonical Factorization for Graph Homomorphisms
JO  - Canadian journal of mathematics
PY  - 1977
SP  - 738
EP  - 743
VL  - 29
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-077-3/
DO  - 10.4153/CJM-1977-077-3
ID  - 10_4153_CJM_1977_077_3
ER  -