@article {9985, title = {Quantum anomalous Hall effect in single-layer and bilayer graphene}, journal = {Physical Review B - Condensed Matter and Materials Physics}, year = {2011}, doi = {10.1103/PhysRevB.83.155447}, author = {Wang-Kong Tse and Zhenhua Qiao and Yugui Yao and A.H. MacDonald and Qian Niu} }