@article{05852473, title = {Periodic graphs.}, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {18}, year = {2011}, zbl = {1213.05166}, language = {en}, url = {http://dml.mathdoc.fr/item/05852473} }
Godsil, Chris. Periodic graphs.. The Electronic Journal of Combinatorics [electronic only], Tome 18 (2011) . http://gdmltest.u-ga.fr/item/05852473/