@article{02158444,
title = {Isomorphisms of cyclic abelian covers of symmetric digraphs. II.},
journal = {APPS. Applied Sciences},
volume = {6},
year = {2004},
pages = {53-65},
zbl = {1082.05049},
language = {en},
url = {http://dml.mathdoc.fr/item/02158444}
}
Sato, Iwao. Isomorphisms of cyclic abelian covers of symmetric digraphs. II.. APPS. Applied Sciences, Tome 6 (2004) pp. 53-65. http://gdmltest.u-ga.fr/item/02158444/