@article{racz1983ising,
  title={Ising transition into an order with extensive entropy at T= 0: Potts antiferromagnets in a magnetic field},
  author={R{\'a}cz, Z and Vicsek, T},
  journal={Physical Review B},
  volume={27},
  number={5},
  pages={2992},
  year={1983},
  publisher={American Physical Society}
}