* {{cite journal |doi=10.1088/0951-7715/22/2/010 |last=Macauley |first=Matthew |author2=Mortveit, Henning S. |year=2009 |title=Cycle equivalence of graph dynamical systems |journal=Nonlinearity |volume=22 |issue=2 |pages=421–436 |ref=Macauley:09a|arxiv=0802.4412 |bibcode=2009Nonli..22..421M }} | * {{cite journal |doi=10.1088/0951-7715/22/2/010 |last=Macauley |first=Matthew |author2=Mortveit, Henning S. |year=2009 |title=Cycle equivalence of graph dynamical systems |journal=Nonlinearity |volume=22 |issue=2 |pages=421–436 |ref=Macauley:09a|arxiv=0802.4412 |bibcode=2009Nonli..22..421M }} |