@article{01409630, title = {Higher rank graph }, journal = {The New York Journal of Mathematics [electronic only]}, volume = {6}, year = {2000}, pages = {1-20}, zbl = {0946.46044}, language = {en}, url = {http://dml.mathdoc.fr/item/01409630} }
Kumjian, Alex; Pask, David. Higher rank graph . The New York Journal of Mathematics [electronic only], Tome 6 (2000) pp. 1-20. http://gdmltest.u-ga.fr/item/01409630/