@article{VianaGrebogiPintoetal.2005,
  author    = {R. L. Viana and Celso Grebogi and S. E. D. Pinto and S. R. Lopes and A. M. Batista and J{\"u}rgen Kurths},
  title     = {Bubbling bifurcation : loss of synchronization and shadowing breakdown in complex systems},
  year      = {2005},
}