@article{ChenShangZhouetal.2009,
  author    = {Maoyin Chen and Yun Shang and Changsong Zhou and Ye Wu and J{\"u}rgen Kurths},
  title     = {Enhanced synchronizability in scale-free networks},
  doi       = {10.1063/1.3062864},
  url       = {http://chaos.aip.org/},
  year      = {2009},
}