@article{PikovskijRosenblum2011,
  author    = {Arkadij Pikovskij and Michael Rosenblum},
  title     = {Dynamics of heterogeneous oscillator ensembles in terms of collective variables},
  journal   = {Physica :D, Nonlinear phenomena},
  volume    = {240},
  number    = {9-10},
  pages     = {872 -- 881},
  doi       = {10.1016/j.physd.2011.01.002},
  year      = {2011},
}