@article{2564,
author = {Chao, Chong-Yun},
title = {Some applications of a theorem of Schur to graphs and to a class of endomorphisms},
journal = {Portugaliae mathematica},
volume = {26},
year = {1967},
pages = {505-523},
zbl = {0319.20007},
mrnumber = {0262115},
language = {en},
url = {http://dml.mathdoc.fr/item/2564}
}
Chao, Chong-Yun. Some applications of a theorem of Schur to graphs and to a class of endomorphisms. Portugaliae mathematica, Tome 26 (1967) pp. 505-523. http://gdmltest.u-ga.fr/item/2564/