TY - Front. Mech. Eng. A1 - T. Zhang, K. Ding T1 - Hierarchical fractal structure of perfect single-layer graphene Y1 - 2013-12-05 JF - Frontiers of Mechanical Engineering JO - Front. Mech. Eng. SP - 371 EP - 382 VL - 8 IS - 4 UR - https://journal.hep.com.cn/fme N1 - 10.1007/s11465-013-0279-1 ER -