@article{ZhirovPikovskijShepelyansky2011,
  author    = {O. V. Zhirov and Arkadij Pikovskij and Dima L. Shepelyansky},
  title     = {Quantum vacuum of strongly nonlinear lattices},
  journal   = {Physical review : E, Statistical, nonlinear and soft matter physics},
  volume    = {83},
  number    = {1},
  doi       = {10.1103/PhysRevE.83.016202},
  year      = {2011},
}