@article{PikovskijGuptaTelesetal.2014,
  author    = {Arkadij Pikovskij and Shamik Gupta and Tarcisio N. Teles and Fernanda P. C. Benetti and Renato Pakter and Yan Levin and Stefano Ruffo},
  title     = {Ensemble inequivalence in a mean-field XY model with ferromagnetic and nematic couplings},
  journal   = {Physical review : E, Statistical, nonlinear and soft matter physics},
  volume    = {90},
  number    = {6},
  doi       = {10.1103/PhysRevE.90.062141},
  year      = {2014},
}