TY  - JOUR
AU  - Chao, Chong-Yun
TI  - Some applications of a theorem of Schur to graphs and to a class of endomorphisms
JO  - Portugaliae mathematica
PY  - 1967
SP  - 505
EP  - 523
VL  - 26
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1967__26_4_115054/
LA  - en
ID  - PORMA_1967__26_4_115054
ER  -