@article{03979088,
title = {A digraph equation for homomorphic images.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {9},
year = {1986},
pages = {409-411},
doi = {10.1155/S0161171286000510},
zbl = {0606.05030},
language = {en},
url = {http://dml.mathdoc.fr/item/03979088}
}
Girse, Robert D.; Gillman, Richard A. A digraph equation for homomorphic images.. International Journal of Mathematics and Mathematical Sciences, Tome 9 (1986) pp. 409-411. doi : 10.1155/S0161171286000510. http://gdmltest.u-ga.fr/item/03979088/